Detailed DSD Clinical Background and Feature Cross-Reference
Date: Tuesday 15 September 2026
Last Updated: Tuesday 15 September 2026
Type: Letter
This is a patient-prepared detailed supporting record containing personal DSD-related clinical background and feature cross-reference material.
It may be included with a referral if the GP considers it useful, but it is not intended to replace the formal referral letter, original NHS records, clinical examination findings, laboratory results, imaging, or specialist assessment.
The GP does not need to read the whole document and may use, shorten, correct, reword, omit, or replace any part according to clinical relevance.
Summary
This is a patient-prepared detailed supporting record comparing documented or suspected personal features with the NHS / NHS England sources collected in the DSD reference source pool.
Evidence labels used:
- A — Direct / objectively documented: clinically recorded or formally measured.
- B — Plausible / requires clinical confirmation: a personal concern or observation appears potentially relevant, but no formal clinical confirmation is available.
- C — Weak / nonspecific: the observation may overlap with an official feature but is not specific enough to support DSD on its own.
- D — Not established: current information is insufficient to say the feature is present.
- Unknown — clinically assessable / testable: the feature cannot currently be classified from the available history and requires clinical assessment, testing, or clearer history.
- Context — referral circumstance: relevant background or presentation context rather than diagnostic evidence.
- Testing pathway — specialist decision: an NHS testing route that may become relevant if the clinical / biochemical picture supports it; not itself a personal feature.
- Support pathway — management / service context: support or management that may become relevant after specialist assessment; not diagnostic evidence.
- Referral pathway — specialist destination decision: service-navigation information rather than evidence for or against a diagnosis.
This document does not diagnose DSD and does not claim eligibility for any specific genomic test.
Background
How this line of enquiry developed
- The patient's original plan was to manage transition-related care independently and later use an overseas surgical service in Thailand.
- The overseas pathway expected a period of HRT beforehand. At that stage, a sufficiently stable long-term medication supply was not available, which led the patient to explore UK hormone-care options.
- While reviewing a Gender Identity Clinic (GIC) self-referral form, the patient noticed a reference to a DSD condition and began researching the term.
- Further review of NHS / NHS England DSD, rare-disease and genomic material identified adult specialist DSD services at Cambridge University Hospitals NHS Foundation Trust (CUH) and University College London Hospitals NHS Foundation Trust (UCLH).
- Comparison with the patient's own developmental, anatomical and wider clinical history identified several areas of possible overlap that could not be reliably interpreted without specialist assessment.
- The patient therefore decided not to treat the situation as a typical self-managed HRT pathway.
- Although estradiol / Estrofem and Androcur are accessible to the patient, none has ever been started or used.
This section records how the DSD question arose. It does not establish that a DSD condition is present.
Primary reference:
- NHS DSD Reference Source Pool — Optional Background
Detailed personal records remain in their separate topic files and should be cross-referenced only where relevant.
The purpose of this document is to identify which features may be worth presenting to a GP or specialist for clinical confirmation.
Details
1. Core DSD overview and adult presentation
1.1 Micropenis
Official reference:
- NHS England GeNotes — Differences in sex development
- NHS England GeNotes — Patient aged 18 with delayed puberty
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- B — Possible / requires clinical confirmation
Current personal information:
- There is a personal concern that penile size may be smaller than expected and may possibly overlap with the clinical concept of micropenis.
- No formal stretched penile length measurement has been performed.
Interpretation:
- This should remain a suspected developmental feature only.
- If clinically relevant, formal stretched penile length measurement can be performed by a clinician.
1.2 Low testicular volume / small testes
Official reference:
- NHS England GeNotes — Patient aged 18 with delayed puberty
- NHS — Klinefelter syndrome
Current status:
- B — Possible / requires clinical confirmation
Current personal information:
- There is a personal concern that testicular size may be smaller than expected.
- No orchidometer measurement or ultrasound-based testicular volume has been recorded.
Interpretation:
- Testicular size cannot be reliably classified from visual estimation alone.
- If clinically relevant, formal examination or measurement can establish whether testicular volume is reduced.
1.3 Possible abnormal testicular position
Official reference:
- NHS England GeNotes — Differences in sex development
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
- NHS — Androgen insensitivity syndrome
Current status:
- B — Possible historical or current abnormal testicular position; requires clinical clarification
Current personal information:
- The patient does not know the testicular position at birth.
- There is a personal concern that testicular position may not always have been typical.
- No childhood record, current examination, or imaging confirmation is presently available.
Interpretation:
- This should not be presented as confirmed cryptorchidism.
- Congenital undescended testes, later ascending testes, retractile testes, and normal variation have not been distinguished.
- If clinically relevant, examination and review of any available historical records can clarify this.
1.4 Hypospadias / chordee
Official reference:
- NHS England GeNotes — Differences in sex development
- NHS — Androgen insensitivity syndrome
Current status:
- D — Not established
Current personal information:
- The patient is not currently able to identify whether hypospadias or chordee is present.
Interpretation:
- These are anatomical findings and should not be self-classified without a clear anatomical observation or clinical examination.
- If clinically relevant, direct examination is the appropriate method of confirmation.
1.5 Failure to thrive
Official reference:
- NHS England GeNotes — Differences in sex development
Current status:
- D — Not established
Current personal information:
- No sufficiently specific childhood growth or weight record has yet been identified to establish failure to thrive.
Interpretation:
- This should remain unclaimed unless historical clinical records support it.
1.6 Hyponatraemia / dehydration
Official reference:
- NHS England GeNotes — Differences in sex development
- NHS England GeNotes — Congenital adrenal hyperplasia
Current status:
- D — Not established
Current personal information:
- A separate July 2026 record documents marked thirst, increased urination, fatigue, salt preference and temporary use of oral rehydration solution.
- These observations do not establish hyponatraemia or clinically diagnosed dehydration.
Interpretation:
- Do not convert salt preference, thirst or increased urination into an electrolyte diagnosis.
- Laboratory results would be required to establish hyponatraemia.
Cross-reference:
- July 2026 Excessive Thirst, Increased Urination and Salt Craving Record
1.7 Atypical growth pattern / stature
Official reference:
- NHS England GeNotes — Differences in sex development
- NHS — Klinefelter syndrome
- NHS England GeNotes — Turner syndrome
Current status:
- B — Previously clinically measured; exact values not currently available
Current personal information:
- The patient recalls that a clinician previously measured arm span with both arms fully extended.
- The patient recalls that arm span was greater than standing height.
- Exact measurements and the clinician's formal interpretation are not currently available.
Interpretation:
- This is stronger than a purely visual self-observation because a clinical measurement was reportedly performed.
- It should not be treated as a fully documented objective finding until the exact measurement or clinical record is available.
1.8 Gynaecomastia / breast tissue
Official reference:
- NHS England GeNotes — Differences in sex development
- NHS — Klinefelter syndrome
- NHS — Androgen insensitivity syndrome
Current status:
- Unknown — clinically assessable
Current personal information:
- There is a personal concern that breast tissue may be present.
- No formal clinical assessment confirming gynaecomastia is currently recorded.
Interpretation:
- External appearance alone cannot reliably distinguish glandular tissue from fat.
- Clinical inspection and palpation can assess whether gynaecomastia is present.
1.9 Infertility
Official reference:
- NHS England GeNotes — Differences in sex development
- NHS — Klinefelter syndrome
- NHS — Androgen insensitivity syndrome
Current status:
- Unknown — testable
Current personal information:
- There is no current objective fertility assessment establishing infertility.
Interpretation:
- Fertility should remain unknown unless supported by reproductive history, semen analysis or other clinical evidence.
1.10 Adult first presentation
Official reference:
- NHS — Differences in sex development
- UCLH — Differences in Sex Development service
Current status:
- Context — Relevant referral circumstance
Current information:
- The present concern is being raised in adulthood without a previously established DSD diagnosis.
Interpretation:
- This is not evidence of a DSD diagnosis.
- It is relevant because NHS and specialist-service information recognises that DSD may first be investigated in adolescence or adulthood.
2. Current NHS genomic testing routes
2.1 R146 — Differences in sex development
Current status:
- Not an eligibility claim
Interpretation:
- R146 should not be treated as a diagnosis or as proof that testing is required.
- The purpose of the present cross-reference is to identify clinical features that may justify specialist assessment.
- Whether R146 or any other genomic route is appropriate should be decided after clinical, chromosomal, biochemical and/or anatomical assessment as relevant.
2.2 R314 — Ambiguous genitalia
Current status:
- Not established — requires professional anatomical assessment
Interpretation:
- The present record does not establish that genital anatomy meets the clinical definition of ambiguous genitalia.
- Possible penile-size or anatomical concerns should be examined clinically rather than self-classified as R314 eligibility.
2.3 R468 — Possible sex chromosome aneuploidy or structural rearrangement
Current status:
- Not an eligibility claim
Interpretation:
- This route becomes relevant when the clinical pattern creates suspicion of a sex-chromosome abnormality.
- No sex-chromosome abnormality is presently established.
3. Puberty, hypogonadism and developmental features
3.1 Delayed, incomplete or absent puberty
Official reference:
- NHS England GeNotes — Patient aged 18 with delayed puberty
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- Unknown — historical pattern requires review
Current personal information:
- The current historical record is not sufficiently clear to establish delayed, absent or arrested puberty.
Interpretation:
- This remains an important history question for a clinician and should remain unknown until the historical pattern is clarified.
3.2 LH / FSH and sex-hormone pattern
Official reference:
- NHS England GeNotes — Patient aged 18 with delayed puberty
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
- R148 Hypogonadotropic hypogonadism
Current status:
- Unknown — laboratory assessment required
Current information:
- No confirmed pattern of low testosterone / oestradiol with low or inappropriately normal LH / FSH is currently recorded here.
Interpretation:
- This is a laboratory question and should remain unknown unless clinical testing establishes a relevant pattern.
3.3 Anosmia / hyposmia
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- Unknown — subjective history unclear / formally assessable if relevant
Current personal information:
- The patient cannot reliably determine whether sense of smell is reduced compared with normal.
Interpretation:
- Do not classify this as present or absent from self-comparison alone.
- Formal assessment can be considered if clinically relevant.
3.4 Hypodontia / dental-development background
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- C — Possible developmental background; hypodontia not established
Current personal information:
- Approximately 28 adult teeth are currently present.
- There is a recollection that tooth replacement may not have been complete at around age 12.
- Earlier drafts also noted uncertainty about eruption / arrangement.
Interpretation:
- Having 28 adult teeth does not by itself establish hypodontia.
- The observation should be treated as dental-development background only unless dental records or examination confirm congenitally missing teeth or another developmental abnormality.
3.5 Joint flexibility / possible hypermobility background
Reference context:
- NHS — Joint hypermobility syndrome
- Beighton-style joint hypermobility assessment references
Current status:
- B — Previously clinically assessed; exact findings not currently available
Current personal information:
- The patient recalls that a clinician previously assessed joint flexibility, including finger movement / backward extension.
- The patient also recalls being asked about activities such as W-sitting.
- The exact Beighton score, formal interpretation, and full examination findings are not currently available.
Interpretation:
- This should not be recorded as confirmed generalised joint hypermobility.
- W-sitting is not itself a standard Beighton criterion.
- If clinically relevant, a repeat standardised joint-hypermobility assessment can be performed.
- This is adjacent musculoskeletal / developmental background rather than a core DSD feature.
4. Klinefelter syndrome — developmental and functional features
4.1 Developmental history
Official reference:
- NHS — Klinefelter syndrome
Current status:
- C+ / possible historical supporting feature
Current personal information:
- Independent walking was approximately 13 months, which does not currently suggest a clear motor delay.
- Family recalls that the patient spoke very little before approximately age 3.
- No contemporaneous childhood developmental record is currently available.
Interpretation:
- The walking history does not currently add meaningful support.
- The speech / language history may represent delayed speech development, but the exact milestone and degree of delay cannot be established retrospectively from family recall alone.
- This should remain a supporting developmental history rather than a confirmed developmental diagnosis.
4.2 Reading / writing / spelling / attention difficulties
Official reference:
- NHS — Klinefelter syndrome
- NHS — Dyslexia
Current status:
- B/C — Present functional difficulty; formal diagnostic assessment incomplete
Current personal information:
- The patient reports ongoing reading difficulty.
- An ADHD assessment pathway has begun and a questionnaire has been received for completion.
- Dyslexia has not been formally assessed and may be considered later, for example after returning to university.
- Writing / spelling difficulty should only be added as a specific feature if the patient later confirms it clearly.
Interpretation:
- Reading difficulty is a current patient-reported functional problem.
- Possible ADHD remains under assessment and is not yet a confirmed diagnosis.
- Dyslexia should not be recorded as diagnosed.
- These features are nonspecific and should only be used as supporting developmental context rather than as major DSD evidence.
4.3 Low energy
Official reference:
- NHS — Klinefelter syndrome
Current status:
- C — Present as a symptom, but nonspecific
Current personal information:
- The patient has a history of significant fatigue / low-energy episodes.
- These episodes have occurred in the context of other health problems and are not specific to DSD.
Interpretation:
- Low energy is too nonspecific to carry substantial referral weight on its own.
4.4 Tall stature / long limbs / body proportions
Official reference:
- NHS — Klinefelter syndrome
Current status:
- B — Previously clinically measured; exact values not currently available
Current personal information:
- The patient recalls that a clinician measured arm span with both arms extended.
- The patient recalls that arm span was greater than standing height.
- Exact centimetre measurements and the clinician's formal interpretation are not currently available.
Interpretation:
- This is stronger than a purely visual self-observation because a clinical measurement was performed.
- It should not yet be treated as a fully documented objective finding until the exact measurement or clinical record is available.
4.5 Broad hips
Official reference:
- NHS — Klinefelter syndrome
Current status:
- C — Possible but nonspecific
Interpretation:
- Broad hips may be visually apparent but are influenced by normal body-shape variation.
- No formal clinical body-proportion assessment confirming this feature is currently available.
- This should remain a minor supporting feature only.
4.6 Poor muscle tone / slower muscle growth
Official reference:
- NHS — Klinefelter syndrome
Current status:
- B/C — Clinically relevant strength / functional background; mechanism not established
Current personal information:
- Separate FCP / MSK records document lower-limb strength and functional difficulties, including previously recorded mild quadriceps weakness and continuing rehabilitation needs.
Interpretation:
- These records establish a genuine musculoskeletal / functional issue.
- They do not establish that the problem represents Klinefelter-related poor muscle tone or reduced muscle development.
- Detailed lower-limb history should remain in the dedicated MSK record.
4.7 Reduced facial / body hair
Official reference:
- NHS — Klinefelter syndrome
Current status:
- C — Natural hair pattern cannot now be assessed reliably
Current personal information:
- Regular shaving, grooming and IPL have altered the visible facial / body-hair pattern.
Interpretation:
- Current appearance should not be used to infer naturally reduced facial or body hair.
- No clinical assessment confirming reduced hair growth is available.
- This feature is unlikely to carry significant referral weight unless a clinician can establish a relevant historical or physical pattern.
4.8 Small, firm testes
Official reference:
- NHS — Klinefelter syndrome
Current status:
- Small testes: B — Possible / requires clinical confirmation
- Firm testes: D — Not established
Interpretation:
- Possible reduced testicular size has already been recorded under the general DSD section.
- Testicular volume can be assessed clinically using an orchidometer or ultrasound where relevant.
- Testicular firmness / consistency requires clinical palpation and should not be self-classified.
4.9 Gynaecomastia
Official reference:
- NHS — Klinefelter syndrome
Current status:
- Unknown — clinically assessable
Current personal information:
- There is a personal concern about possible breast / chest tissue difference.
- No clinical examination has established glandular breast tissue.
Interpretation:
- External appearance or cup size cannot reliably distinguish glandular tissue from fat.
- Clinical examination, principally inspection and palpation, can assess whether gynaecomastia is present.
- Further imaging is only required if clinically indicated.
4.10 Fertility status
Official reference:
- NHS — Klinefelter syndrome
Current status:
- Unknown — testable
Interpretation:
- Fertility cannot be inferred from appearance or from the current history.
- If clinically relevant, assessment may include reproductive history, semen analysis and hormone testing.
- Infertility should not be recorded as present unless clinically established.
4.11 Libido
Official reference:
- NHS — Klinefelter syndrome
Current status:
- Unknown — subjective history unclear
Interpretation:
- Libido is subjective and has many possible causes.
- No single test establishes low libido.
- If clinically relevant, a clinician can review sexual history alongside hormone status, medication, mood, sleep and general health.
4.12 Erectile function
Official reference:
- NHS — Klinefelter syndrome
Current status:
- Unknown — history requires clarification
Interpretation:
- Erectile difficulty generally refers to recurrent difficulty obtaining or maintaining an erection when desired.
- The present record is not sufficiently clear to classify this as present or absent.
- If relevant, this can be clarified through clinical history and assessment.
5. Androgen insensitivity syndrome (AIS / CAIS / PAIS)
5.1 Overall genital development
Official reference:
- NHS — Androgen insensitivity syndrome
- NHS — Androgen insensitivity syndrome: diagnosis
- UCLH — Complete androgen insensitivity syndrome (CAIS)
Current status:
- Unknown — specialist anatomical assessment required
Current personal information:
- The patient cannot reliably determine whether external genital development meets any clinical definition relevant to AIS / PAIS / CAIS.
Interpretation:
- External appearance alone should not be used to self-classify CAIS or PAIS.
- If clinically relevant, specialist assessment may include physical examination, chromosome testing, hormone testing, genetic testing and imaging.
5.2 Undescended / partially undescended testes
Official reference:
- NHS — Androgen insensitivity syndrome
Current status:
- B — Possible abnormal testicular position; requires clinical clarification
Interpretation:
- This is the same feature already reviewed under the general DSD section.
- The current record does not establish congenital undescended testes, ascending testes or retractile testes.
- No separate AIS-specific rating is required.
5.3 Small / underdeveloped penis
Official reference:
- NHS — Androgen insensitivity syndrome
Current status:
- B — Possible / requires clinical confirmation
Interpretation:
- This overlaps with the earlier possible micropenis / reduced penile size concern.
- Small penile size and formally defined micropenis should not be treated as identical without clinical measurement.
- No separate AIS-specific rating is required.
5.4 Hypospadias
Official reference:
- NHS — Androgen insensitivity syndrome
Current status:
- D — Not established
Current personal information:
- The patient is not currently able to identify whether hypospadias is present.
Interpretation:
- This is an anatomical feature that can usually be assessed clinically.
- It should remain unclaimed unless confirmed by a clear anatomical observation or clinical examination.
5.5 Pubic / underarm hair
Official reference:
- NHS — Androgen insensitivity syndrome
- UCLH — Complete androgen insensitivity syndrome (CAIS)
Current status:
- Unknown — difficult to assess retrospectively
Current personal information:
- Regular grooming / hair removal means the natural pubic and underarm hair pattern is not currently easy to assess reliably.
Interpretation:
- Current visible hair distribution should not be used to infer an AIS-related pattern.
- Historical information or clinical assessment can be considered if relevant.
5.6 Breast development
Official reference:
- NHS — Androgen insensitivity syndrome
- UCLH — Complete androgen insensitivity syndrome (CAIS)
Current status:
- Unknown — clinically assessable
Interpretation:
- External appearance alone cannot reliably distinguish glandular breast tissue from fat.
- Clinical inspection and palpation can assess breast / glandular tissue development if relevant.
- Cup size should not be used as diagnostic evidence.
5.7 Puberty pattern
Official reference:
- NHS — Androgen insensitivity syndrome
- UCLH — Complete androgen insensitivity syndrome (CAIS)
Current status:
- Unknown — historical pattern requires specialist review
Interpretation:
- The current personal puberty history is not sufficiently complete to classify an AIS-type pubertal pattern.
- Specialist review may integrate pubertal history with hormone, chromosome and anatomical findings.
5.8 Gonadal / internal reproductive anatomy
Official reference:
- NHS — Androgen insensitivity syndrome: diagnosis
- UCLH — Complete androgen insensitivity syndrome (CAIS)
Current status:
- Unknown — investigation required
Interpretation:
- Internal reproductive anatomy cannot generally be determined from external appearance.
- If clinically indicated, assessment may include ultrasound or other imaging alongside chromosome and hormone testing.
5.9 Chromosome pattern
Official reference:
- NHS — Androgen insensitivity syndrome: diagnosis
Current status:
- Unknown — testable
Interpretation:
- AIS cannot be established from external appearance alone.
- Chromosome analysis is one component of specialist diagnostic assessment.
5.10 Hormone / testosterone pattern
Official reference:
- NHS — Androgen insensitivity syndrome: diagnosis
Current status:
- Unknown — laboratory assessment required
Interpretation:
- AIS is not simply a condition of low testosterone; the central issue is altered androgen response.
- Hormone results require specialist interpretation in the context of clinical and anatomical findings.
5.11 Androgen receptor genetic testing
Official reference:
- NHS — Androgen insensitivity syndrome: diagnosis
Current status:
- Unknown — specialist / genetic testing decision
Interpretation:
- Genetic testing may be considered where the clinical picture supports AIS.
- The patient is not requesting a specific genetic test; the appropriate testing strategy should be determined clinically.
5.12 Fertility / sperm production
Official reference:
- NHS — Androgen insensitivity syndrome
Current status:
- Unknown — testable
Interpretation:
- Fertility and sperm production cannot be inferred from external appearance.
- If clinically relevant, assessment may include semen analysis, hormone testing and gonadal assessment.
6. Congenital hypogonadotropic hypogonadism (CHH) / R148
6.1 Micropenis
Current status:
- Previously reviewed — B
Interpretation:
- Retain the existing classification.
- This feature has already been reviewed under the general DSD section and remains possible pending formal stretched penile length measurement.
6.2 Cryptorchidism / abnormal testicular position
Current status:
- Previously reviewed — B
Interpretation:
- Retain the existing classification.
- Congenital undescended, ascending and retractile testes have not been distinguished clinically.
6.3 Delayed / absent / arrested puberty
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
- NHS England GeNotes — Patient aged 18 with delayed puberty
Current status:
- Unknown — historical pattern requires review
Interpretation:
- The available personal puberty history is not sufficiently complete to establish delayed, absent or arrested puberty.
- Specialist review can integrate developmental history, physical findings and hormone results.
6.4 LH / FSH and sex-hormone pattern
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
- R148 Hypogonadotropic hypogonadism
Current status:
- Unknown — laboratory assessment required
Interpretation:
- This cannot be determined from appearance.
- If clinically relevant, LH, FSH and sex-hormone testing can be interpreted in endocrine context.
- The current document does not claim eligibility for R148.
6.5 Anosmia / hyposmia
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- Unknown — subjective history unclear / formally assessable if relevant
Current personal information:
- The patient cannot reliably determine whether sense of smell is reduced compared with normal.
Interpretation:
- Do not classify anosmia or hyposmia as present.
- Formal smell assessment can be considered if clinically relevant.
6.6 Hearing loss
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- D — No current evidence
Current personal information:
- The patient reports no known hearing difficulty.
- A previous aeromedical assessment was reportedly passed without difficulty.
Interpretation:
- No formal audiogram result is currently available in this working record.
- This feature does not currently add support.
6.7 Mirror movements
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- D — Not established
Interpretation:
- No current personal history or clinical finding supports mirror movements.
- This feature should remain unclaimed unless identified on directed neurological examination or reliable history.
6.8 Midline abnormalities
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- D — Not established
Interpretation:
- No known relevant midline developmental abnormality is currently recorded.
- This feature does not currently add support.
6.9 Hypodontia / dental-development background
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- C — Relevant dental-development background; hypodontia not established
Current personal information:
- Approximately 28 adult teeth are visibly present.
- The last four visible teeth appear to have erupted in positions similar to where wisdom teeth would normally be expected.
- It is not known whether any further unerupted / impacted teeth are present, or whether any permanent teeth are congenitally absent.
- There is also a recollection that tooth replacement may not have been complete at around age 12.
Interpretation:
- A visible count of 28 teeth does not establish hypodontia.
- The eruption pattern and current visible tooth count are worth retaining as developmental background.
- Dental records, professional examination and, if clinically relevant, dental imaging such as a panoramic radiograph would be required to determine whether hypodontia, impaction or another developmental dental pattern is present.
6.10 Renal agenesis
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- Unknown / not investigated
Interpretation:
- Renal agenesis is generally not identifiable from external appearance.
- No current personal history or imaging result establishes this feature.
- It is currently a low-priority item unless other clinical findings make renal imaging relevant.
6.11 Congenital limb abnormalities
Official reference:
- NHS England GeNotes — Congenital hypogonadotropic hypogonadism
Current status:
- D — No current evidence of a congenital limb abnormality
Current personal information:
- Separate records document lower-limb pain, alignment observations, mild quadriceps weakness and functional difficulty.
Interpretation:
- These existing MSK findings do not establish a congenital limb abnormality.
- The current musculoskeletal history should remain separate from this CHH-associated congenital feature.
6.12 R148 — Hypogonadotropic hypogonadism
Current status:
- Testing pathway — only relevant if endocrine assessment supports hypogonadotropic hypogonadism
Interpretation:
- R148 is not itself a clinical feature.
- It becomes relevant when the clinical and biochemical picture supports hypogonadotropic hypogonadism, for example through pubertal history and an appropriate LH / FSH / sex-hormone pattern.
- The current document does not claim eligibility for R148.
7. CAH / adrenal-related features
7.1 Salt-wasting crisis / electrolyte disturbance
Official reference:
- NHS England GeNotes — Congenital adrenal hyperplasia
- NHS England GeNotes — Differences in sex development
Current status:
- Hyponatraemia: D — Not established
- Clinically confirmed dehydration: D — Not established
Current personal information:
- A separate July 2026 record documents marked thirst, increased urination, fatigue, salt preference and temporary use of oral rehydration solution.
Interpretation:
- These symptoms do not establish hyponatraemia, hyperkalaemia, adrenal insufficiency or a salt-wasting crisis.
- Typical classical salt-wasting CAH presentations depend on clinical and biochemical findings, often including electrolyte disturbance.
- The July systemic episode should remain a separate background record unless laboratory evidence later supports an adrenal or electrolyte explanation.
7.2 Ambiguous genitalia / virilisation / under-virilisation
Official reference:
- NHS England GeNotes — Congenital adrenal hyperplasia
- NHS England GeNotes — Differences in sex development
Current status:
- Ambiguous genitalia: Not established — requires professional anatomical assessment
- Hypospadias: Previously reviewed — D
- Possible reduced penile size / micropenis: Previously reviewed — B
Interpretation:
- Possible reduced penile size does not by itself establish a CAH-related genital phenotype.
- Virilisation, under-virilisation and ambiguous genitalia are clinical anatomical concepts that should not be self-classified.
- Clinical examination, chromosome context and biochemical assessment would be required if this direction becomes relevant.
7.3 Early puberty / androgen excess
Official reference:
- NHS England GeNotes — Congenital adrenal hyperplasia
Current status:
- D — Not established
Interpretation:
- No sufficiently clear history currently supports precocious puberty, markedly early pubic hair development, accelerated pre-pubertal growth, clinically significant androgen excess or advanced bone age.
- This feature does not currently add support.
7.4 R180 — Congenital adrenal hyperplasia diagnostic test
Current status:
- Testing pathway — only relevant if biochemical assessment supports CAH
Interpretation:
- R180 is not itself a clinical feature.
- The current NHS pathway relies on biochemical evidence of CAH together with the relevant clinical presentation.
- The current document does not claim eligibility for R180.
7.5 R150 — Congenital adrenal hypoplasia
Current status:
- Unknown / not established — requires endocrine evidence
Interpretation:
- R150 is a testing pathway rather than a visible clinical feature.
- Congenital adrenal hypoplasia requires evidence of adrenal insufficiency and exclusion of other relevant causes.
- Current thirst, salt-preference or fatigue history does not establish adrenal insufficiency.
- If clinically relevant, endocrine / biochemical assessment would determine whether this pathway has any relevance.
7.6 R160 — Primary pigmented nodular adrenocortical disease / ACTH-independent Cushing syndrome
Current status:
- D — No current evidence supporting this pathway
Interpretation:
- R160 is relevant where PPNAD or ACTH-independent Cushing syndrome has been clinically / biochemically established.
- No current record establishes cortisol excess, ACTH-independent Cushing syndrome, PPNAD or a related adrenal lesion.
- This pathway currently adds no referral support.
7.7 Rare CAH forms with under-virilisation
Official reference:
- NHS England GeNotes — Congenital adrenal hyperplasia
Current status:
- Unknown — cannot be distinguished without endocrine assessment
Interpretation:
- Some rarer CAH enzyme defects may involve androgen deficiency or under-virilisation rather than androgen excess.
- Possible reduced penile size or other genital-development concerns do not identify a specific CAH subtype.
- Hormone / adrenal steroid assessment and specialist interpretation would be required before this direction could be considered.
7.8 Hypertension / mineralocorticoid-excess patterns
Official reference:
- NHS England GeNotes — Congenital adrenal hyperplasia
Current status:
- D — Not established
Interpretation:
- No clear current history establishes early, persistent or otherwise unexplained hypertension associated with an adrenal steroid disorder.
- This feature currently adds no support.
8. Turner syndrome, MRKH and lower-priority differential references
8.1 Turner syndrome
Official reference:
- NHS England GeNotes — Turner syndrome
Current status:
- D / Low relevance on current information
Interpretation:
- Typical Turner-related features include short stature, ovarian dysgenesis / primary ovarian insufficiency and absent or incomplete puberty.
- The current record does not show a clear Turner-type pattern.
- The reference remains useful for navigation but is unlikely to contribute materially to the GP referral case.
8.2 R468 — Possible sex chromosome aneuploidy or structural rearrangement
Current status:
- Previously reviewed — testing pathway / specialist decision
Interpretation:
- Retain the existing positioning.
- R468 is relevant only if the overall clinical pattern creates suspicion of a sex-chromosome abnormality.
8.3 MRKH
Official reference:
- Imperial College Healthcare NHS Trust — MRKH
Current status:
- D / Low relevance on current information
Interpretation:
- MRKH is primarily defined by internal reproductive-tract anatomy, including uterine / cervical / vaginal development.
- The current record does not show a clear MRKH-specific pattern.
- This reference should remain in the navigation library but is unlikely to contribute to the final GP referral case unless new anatomical information emerges.
8.4 Primary ovarian insufficiency / R402
Current status:
- D / Not relevant on current information
Interpretation:
- R402 relates to a specific ovarian-insufficiency pattern involving amenorrhoea and repeated FSH elevation.
- No current information supports this pathway.
- It should remain as a reference-library item only.
8.5 Renal, hearing and congenital skeletal associated findings
Current status:
- Hearing: D — No current evidence
- Renal anomaly: Unknown / not investigated, low priority
- Congenital skeletal anomaly: D — No current evidence
Current personal information:
- The patient reports no known hearing difficulty and previously passed an aeromedical assessment without difficulty.
- No known renal developmental abnormality is currently recorded.
- Existing lower-limb MSK problems do not establish a congenital skeletal anomaly.
Interpretation:
- These findings currently add little or no support to a DSD referral case.
- Current musculoskeletal problems should remain separate from congenital skeletal-anomaly references unless a clinician identifies a specific developmental abnormality.
9. Bone health, HRT, gonadal management and referral support
9.1 Bone health / osteoporosis relevance
Official reference:
- UCLH — Complete androgen insensitivity syndrome (CAIS)
- NHS — Osteoporosis: causes
Current status:
- Unknown — bone disease not established; current MSK problem is separate relevant background
Current personal information:
- Separate records document an ongoing lower-limb musculoskeletal / functional problem requiring FCP and MSK assessment and rehabilitation.
Interpretation:
- Current MSK symptoms do not establish osteoporosis, metabolic bone disease or hormone deficiency.
- In some DSD / hypogonadal contexts, clinically significant sex-hormone deficiency may be relevant to long-term bone health.
- If clinically indicated, bone-health assessment may include hormone status, vitamin / mineral assessment and bone-density testing.
9.2 HRT relevance
Official reference:
- UCLH — Complete androgen insensitivity syndrome (CAIS)
- NHS — Androgen insensitivity syndrome
- NHS — Osteoporosis: causes
Current status:
- Unknown — depends on confirmed hormone / gonadal status
Current personal information:
- The patient has access to estradiol / Estrofem and Androcur but has never started or used these medicines.
- After considering possible DSD / endocrine questions, the patient chose not to start exogenous HRT before appropriate clinical assessment.
Interpretation:
- HRT is not being requested on the basis of current MSK symptoms alone.
- If specialist assessment identifies clinically significant sex-hormone deficiency, loss of gonadal hormone function or another clear indication, hormone replacement may become relevant.
- The patient does not have a preferred HRT regimen and is open to specialist guidance.
9.3 Gonadal surveillance / gonadectomy
Official reference:
- UCLH — Complete androgen insensitivity syndrome (CAIS)
- UCLH — Laparoscopic gonadectomy
- UCLH — Inguinal gonadectomy
Current status:
- Unknown — diagnosis / gonadal anatomy dependent
Interpretation:
- Gonadal surveillance, tumour-risk assessment or gonadectomy should not be assumed before a relevant DSD diagnosis or gonadal-anatomy finding is established.
- If clinically indicated, specialist assessment may include examination, imaging, blood testing and multidisciplinary review.
9.4 Psychological / reproductive support
Official reference:
- NHS — Differences in sex development
- UCLH — Differences in Sex Development service
- UCLH — Women’s Health Psychological Services
- UCLH — Reproductive Medicine Unit
Current status:
- Support pathway — not diagnostic evidence
Interpretation:
- Psychological, body-image, sexuality, relationship and reproductive support may form part of multidisciplinary DSD care where relevant.
- These services are not evidence for or against a DSD diagnosis and do not require a separate personal feature classification.
9.5 UCLH / CUH referral navigation
Official reference:
- UCLH — Differences in Sex Development service
- CUH — Adult disorders of sexual differentiation (DSD) clinic
Current status:
- Referral pathway — specialist destination decision
Interpretation:
- UCLH publicly describes a tertiary adolescent / adult DSD service and explicitly recognises adult first presentation.
- CUH / Addenbrooke’s publicly lists an Adult DSD clinic within the Adult Endocrine service.
- The patient is open to referral to either centre and does not require a specific destination.
- As the patient is within the CUH area, Addenbrooke’s may be a practical local option, but another specialist centre such as UCLH is also acceptable if clinically or administratively more appropriate.
- Public information does not clearly establish a complete comparison of the two services or all pre-referral requirements.
- The GP may use local NHS referral pathways, service criteria, Advice and Guidance, or other appropriate referral mechanisms to determine the most suitable destination.
9.6 Broader clinical context
Current status:
- Context — GP-level clinical consideration, not a DSD diagnostic claim
Interpretation:
- Several different health problems have required assessment over a relatively short period.
- These problems may ultimately be unrelated.
- The patient would nevertheless appreciate the GP considering whether any broader underlying factor warrants assessment rather than treating every problem entirely in isolation.
- This statement should not be used to imply that the current lower-limb, upper-limb, skin, systemic or other problems share a proven cause.