| http://www.w3.org/ns/prov#value | - DefinitionNiemann-Pick disease is a group of diseases passed down through families (inherited) in which fatty substances called lipids collect in the cells of the spleen, liver, and brain.There are four most commonly recognized forms of the disease: Types A, B, C, and D. Types A and B are also called Type I. Types C and D are also known as Type II.Each type involves different organs.
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