10 Causes of Hypersomnia
Cause #6: Niemann-Pick Disease, Type C
Niemann-Pick type C is a type of disease where there is a lysosomal storage disease that is associated with NPC1 and NPC2 genes. It is a condition that affects 1 in every 150,000 individuals. This disease has a wide clinical spectrum where affected individuals may experience hepatomegaly, splenomegaly, and more. There can also be prolonged jaundice.
Other neurological symptoms include unsteady walking, slurred speech, difficulty swallowing, tremors, epilepsy, dystonia, spasticity, ptosis, hypotonia, depression, hallucinations, and more. It can also cause hypersomnia. While there is no known cure for this condition, supportive care is essential and helps improve the quality of life.
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