(: Niemann-Pick Disease or NPC) (: Sphingomyelinase Deficiency) ɡ ( ) ǡ ǡ .ۡ ȡ ϡ . ѡ .
AA (: Niemann Pick Disease Type A) (: Acid Sphingomyelinase orASM) .A .BB (: Niemann Pick Disease Type B) B .CC (: Niemann Pick Disease Type C) ϡ .E
E (: Niemann Pick Disease Type E) ߡ .D (: Niemann Pick Disease Type D) C . A B ߡ C .