Abstract
The authors report the case of a male patient with regressive picture presenting coarse facies, hepatomegaly, cherry red spot. In radiographic study, enlarged ribs and deformities of vertebral bodies were striking. The biochemical tests showed a deficiency of beta galactosidase enzyme confirming the diagnosis of GMi gangliosidosis type 1 (Norman-Landing disease). The parents had a decreased activity of this enzyme. Convulsive crisis, beyond control, started at one year age. The patient died when it was 15 months old.

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