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Start free with EleplanChronic neurovisceral acid sphingomyelinase deficiency
ORPHA:618891Disease
Also called Chronic neurovisceral ASMD · NPD-A/B · Niemann-Pick disease type A/B
What it is
A rare acid sphingomyelinase deficiency characterized by mild to massive hepatosplenomegaly, hypersplenism leading to thrombocytopenia, interstitial lung disease, dyslipidemia and central nervous system manifestations (including developmental delay, intellectual disability and ataxia). Some affected individuals may present with coarse facial features.
Key facts
- Age of onset
- Infancy, Neonatal
- Inheritance
- Autosomal recessive
- Classified as
- Disease
Signs and symptoms
Very common80–99%
5Common30–79%
10These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
Gene
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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