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Medical Definition of Gangliosidosis g(m1)
1. Form of gangliosidosis characterised by accumulation of g(m1) ganglioside and oligosaccharides, and caused by an absence or severe deficiency of beta-galactosidase a. The three phenotypes of g(m1) gangliosidosis are called infantile (generalised), juvenile, and adult (types 1, 2, and 3 respectively), referring to the age at which clinical manifestations appear. (12 Dec 1998)