Niemann-Pick Disease, Type B, also known as niemann-pick disease type b, is related to niemann-pick disease and splenomegaly, and has symptoms including constipation, vomiting and muscle weakness. An important gene associated with Niemann-Pick Disease, Type B is SMPD1 (Sphingomyelin Phosphodiesterase 1), and among its related pathways/superpathways are Sphingolipid metabolism and Cholesterol metabolism. The drugs Miglustat and Glycoside Hydrolase Inhibitors have been mentioned in the context of this disorder. Affiliated tissues include bone marrow and liver, and related phenotypes are splenomegaly and hypertriglyceridemia