raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:909

Cerebrotendinous xanthomatosis

Synonyms: CTX · Sterol 27-hydroxylase deficiency

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

Cerebrotendinous xanthomatosis (CTX) is an anomaly of bile acid synthesis characterized by neonatal cholestasis, childhood-onset cataract, adolescent to young adult-onset tendon xanthomata, and brain xanthomata with adult-onset neurologic dysfunction.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCerebrotendinous xanthomatosisCTX · Sterol 27-hydroxylase deficiency
frXanthomatose cérébrotendineuseCTX · Déficit en stérol 27-hydroxylase
deXanthomatose, zerebrotendinöseSterol-27-Hydroxylase-Mangel
esXantomatosis cerebrotendinosaDeficiencia de esterol 27-hidroxilasa
itXantomatosi cerebrotendineaDeficit di sterolo 27-idrossilasi
nlCerebrotendineuze xanthomatoseCTX · Sterol 27-hydroxylasedeficiëntie
ptXantomatose cerebrotendinosaDeficiência de esterol 27-hidroxilase
plKsantomatoza mózgowo-ścięgnistaCTX · Niedobór 27-hydroksylazy sterolowej
csCerebrotendinózní xantomatózaCTX · Deficit sterol 27-hydroxylázy
ukЦеребротендінозний ксантоматозCTX · Дефіцит стерол 27-гідроксилази
zh脑腱性黄瘤病甾醇27-羟化酶缺乏症
trSerebrotendinöz ksantomatozCTX · Sterol 27-hidroksilaz eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM213700Evalidated
ICD-10E75.5NTBTinclusionvalidated
ICD-115C52.11NTBTindexvalidated
MONDO0008948Evalidated
MeSHD019294Evalidated
UMLSC0238052Evalidated
GARD5622Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (12):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CYP27A1Disease-causing germline mutation(s) inAssessedHGNC:2605ENSG000001359296065302q35cytochrome P450 family 27 subfamily A member 120301583[PMID]
5

Prevalence and incidence

4 records
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 100 0002 / 100 000Specific populationValue and classValidated16157755[PMID]_[EXPERT]
Point prevalence<1 / 1 000 0000.056 / 100 000SpainValue and classValidated21645175[PMID]
Point prevalence1-9 / 100 0004 / 100 000United StatesValue and classValidated16157755[PMID]
Point prevalenceUnknown—WorldwideClass onlyNot yet validatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

91 annotations · validated 2021-04-13
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0012379Abnormal enzyme/coenzyme activity
HP:0001118Juvenile cataract
HP:0000505Visual impairment
Frequent (79-30%)
HP:0006958Abnormal auditory evoked potentials
HP:0001317Abnormal cerebellum morphology
HP:0002453Abnormal globus pallidus morphology
HP:0012896Abnormal motor evoked potentials
HP:0007256Abnormal pyramidal sign
HP:0008046Abnormal retinal vascular morphology
HP:0002071Abnormality of extrapyramidal motor function
HP:0001167Abnormality of finger
HP:0007377Abnormality of somatosensory evoked potentials
HP:0005109Abnormality of the Achilles tendon
HP:0011931Abnormality of the cerebellar peduncle
HP:0100872Abnormality of the plantar skin of foot
HP:0002992Abnormality of tibia morphology
HP:0000649Abnormality of visual evoked potentials
HP:0001251Ataxia
HP:0000708Atypical behavior
HP:0003487Babinski sign
HP:0002028Chronic diarrhea
HP:0100543Cognitive impairment
HP:0000762Decreased nerve conduction velocity
HP:0003693Distal amyotrophy
HP:0001260Dysarthria
HP:0001332Dystonia
HP:0001288Gait disturbance
HP:0030890Hyperintensity of cerebral white matter on MRI
HP:0001347Hyperreflexia
HP:0001249Intellectual disability
HP:0012758Neurodevelopmental delay
HP:0000639Nystagmus
HP:0000543Optic disc pallor
HP:0001138Optic neuropathy
HP:0002310Orofacial dyskinesia
HP:0000939Osteoporosis
HP:0002385Paraparesis
HP:0009830Peripheral neuropathy
HP:0001761Pes cavus
HP:0007272Progressive psychomotor deterioration
HP:0001250Seizure
HP:0001257Spasticity
HP:0001328Specific learning disability
HP:0010874Tendon xanthomatosis
Occasional (29-5%)
HP:0011994Abnormal atrial septum morphology
HP:0000492Abnormal eyelid morphology
HP:0002823Abnormality of femur morphology
HP:0100321Abnormality of the dentate nucleus
HP:0009811Abnormality of the elbow
HP:0001155Abnormality of the hand
HP:0000464Abnormality of the neck
HP:0008516Abnormality of the vertebral spinous processes
HP:0000718Aggressive behavior
HP:0000713Agitation
HP:0007018Attention deficit hyperactivity disorder
HP:0000717Autism
HP:0040078Axonal degeneration
HP:0007305CNS demyelination
HP:0001272Cerebellar atrophy
HP:0001081Cholelithiasis
HP:0000716Depression
HP:0012706Elevated brain choline level by MRS
HP:0012707Elevated brain lactate level by MRS
HP:0002171Gliosis
HP:0002283Global brain atrophy
HP:0000738Hallucinations
HP:0007922Hypermyelinated retinal nerve fibers
HP:0000821Hypothyroidism
HP:0002151Increased circulating lactate concentration
HP:0002659Increased susceptibility to fractures
HP:0002423Long-tract signs
HP:0200125Mitochondrial respiratory chain defects
HP:0000648Optic atrophy
HP:0000938Osteopenia
HP:0001300Parkinsonism
HP:0012075Personality disorder
HP:0004416Precocious atherosclerosis
HP:0005181Premature coronary artery atherosclerosis
HP:0006480Premature loss of teeth
HP:0007495Prematurely aged appearance
HP:0006579Prolonged neonatal jaundice
HP:0000520Proptosis
HP:0002322Resting tremor
HP:0000736Short attention span
HP:0031589Suicidal ideation
HP:0002942Thoracic kyphosis
Very rare (<4-1%)
HP:0002088Abnormal lung morphology
HP:0002196Myelopathy
HP:0010530Palatal myoclonus
HP:0003474Somatic sensory dysfunction
HP:0002313Spastic paraparesis

Run the differential on the 3 obligate / very frequent terms

Annotation source: 20301583[PMID]_33232000[PMID]_28980151[PMID]

7

Sources for this card