Some patients show onset later in childhood [MISCELLANEOUS] Most patients show early childhood onset after a period of normal development [MISCELLANEOUS] Caused by mutation in the alpha-mannosidase gene (MAN2B1, 609458.0001) [MOLECULAR BASIS] Some patients show infantile onset [MISCELLANEOUS] Neurologic symptoms are progressive [MISCELLANEOUS] Wide phenotypic variability and severity [MISCELLANEOUS]
|