The causes for PWS are either genetic or unknown. Some cases are a direct result of the RASA1 gene mutations. And individuals with RASA1 can be identified because this genetic mutation always causes multiple capillary malformations. PWS displays an autosomal dominant pattern of inheritance. This means that one copy of the damaged or altered gene is sufficient to elicit PWS disorder. In most cases, PWS occurs in people that have no family history of the condition. In such cases the mutation is sporadic. And for patients with PWS with the absence of multiple capillary mutations, the causes are unknown. According to Boston's Children Hospital, no known food, medications or drugs can cause PWS during pregnancy. PWS is not transmitted from person to person. But it can run in families and can be inherited. PWS affects both males and females equally and as of now no racial predominance is found.
Parkes Weber syndrome
Neu–Laxova syndrome
Stratton Parker syndrome
Madras motor neuron disease
Temple–Baraitser syndrome
Dejerine–Sottas disease
De Barsy syndrome
Shapiro syndrome