raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:1764

Familial dysautonomia

Synonyms: HSAN3 · Hereditary sensory and autonomic neuropathy type 3 · Hereditary sensory and autonomic neuropathy type III · Riley-Day syndrome

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

A rare hereditary sensory and autonomic neuropathy characterized by decreased pain and temperature perception, absent deep tendon reflexes, proprioceptive ataxia, afferent baroreflex failure and progressive optic neuropathy.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enFamilial dysautonomiaHSAN3 · Hereditary sensory and autonomic neuropathy type 3 · Hereditary sensory and autonomic neuropathy type III · Riley-Day syndrome
frDysautonomie familialeHSAN3 · NHSA3 · Neuropathie héréditaire sensitive et autonomique type 3 · Neuropathie héréditaire sensitive et autonomique type III · Syndrome de Riley-Day
deDysautonomie, familiäreHSAN3 · Neuropathie, autonome hereditäre sensorische, Typ 3 · Neuropathie, autonome hereditäre sensorische, Typ III · Riley-Day Syndrom
esDisautonomía familiarHSAN3 · Neuropatía sensitiva autonómica hereditaria tipo 3 · Neuropatía sensitiva autonómica hereditaria tipo III · Síndrome de Riley-Day
itDisautonomia familiareNeuropatia autonomica e sensoriale ereditaria, tipo 3 · Sindrome di Riley-Day
nlFamiliale dysautonomieErfelijke sensorische en autonome neuropathie type 3 · Erfelijke sensorische en autonome neuropathie type III · HSAN 3 · Syndroom van Riley-Day
ptDisautonomia familiarNeuropatia autonómica e sensitiva hereditária tipo 3 · Síndrome Riley-Day
plDysautonomia rodzinnaHSAN3 · Zespół Riley'a i Day'a · Dziedziczna neuropatia czuciowa i autonomiczna typu 3 · Dziedziczna neuropatia czuciowa i autonomiczna typu III
csFamiliární dysautonomieHSAN3 · Hereditární senzorická a autonomní neuropatie, typ III · Rileyův-Dayův syndrom · Riley-Dayův syndrom
ukСімейна дисавтономіяСпадкова сенсорна та автономна нейропатія типу 3 · Спадкова сенсорна та автономна нейропатія III типу · HSAN3 · Синдром Райлі-Дея
zh家族性自主神经功能异常遗传性感觉和自主神经病III型
trAilesel disotonomiHSAN3 · Riley-Day sendromu · Kalıtsal duyusal ve otonom nöropati tip 3 · Kalıtsal duyusal ve otonom nöropati tip III

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM223900Evalidated
ICD-10G90.1Especificvalidated
ICD-118C21.1Especificvalidated
MONDO0009131Evalidated
MeSHD004402Evalidated
UMLSC0013364Evalidated
GARD7581Evalidated
MedDRA10039179Evalidated

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 (8):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ELP1Disease-causing germline mutation(s) inAssessedHGNC:5959ENSG000000700616037229q31.3elongator complex protein 120301359[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—EuropeClass onlyNot yet validatedORPHANET
Prevalence at birth1-5 / 10 00018.5 / 100 000Specific populationValue and classValidated27317387[PMID]_3652488[PMID]_4322121[PMID]_ORPHANET

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

37 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000615Abnormal pupil morphology
HP:0000522Alacrima
HP:0003457EMG abnormality
HP:0008872Feeding difficulties in infancy
HP:0001510Growth delay
HP:0000975Hyperhidrosis
HP:0000966Hypohidrosis
HP:0001265Hyporeflexia
HP:0007328Impaired pain sensation
HP:0002047Malignant hyperthermia
HP:0001278Orthostatic hypotension
HP:0009830Peripheral neuropathy
Frequent (79-30%)
HP:0001251Ataxia
HP:0000708Atypical behavior
HP:0200020Corneal erosion
HP:0001288Gait disturbance
HP:0000822Hypertension
HP:0001252Hypotonia
HP:0002205Recurrent respiratory infections
HP:0002650Scoliosis
Occasional (29-5%)
HP:0000077Abnormality of the kidney
HP:0002585Abnormality of the peritoneum
HP:0002103Abnormality of the pleura
HP:0001063Acrocyanosis
HP:0010885Avascular necrosis
HP:0007957Corneal opacity
HP:0002020Gastroesophageal reflux
HP:0100820Glomerulopathy
HP:0001100Heterochromia iridis
HP:0002902Hyponatremia
HP:0000545Myopia
HP:0000648Optic atrophy
HP:0002797Osteolysis
HP:0002757Recurrent fractures
HP:0000083Renal insufficiency
HP:0001250Seizure
HP:0001649Tachycardia

Run the differential on the 12 obligate / very frequent terms

7

Sources for this card