<unk>  (LDD) (), also called dysplastic gangliocytoma of the cerebellum, is a rare, slowly growing tumor of the cerebellum, a gangliocytoma sometimes considered to be a hamartoma, characterized by diffuse hypertrophy of the granular layer of the cerebellum. It is often associated with Cowden syndrome. It was described by Jacques Jean<unk>  and P.<unk>  in 1920.
Lhermitte–Duclos disease
Parkes Weber syndrome
Madras motor neuron disease
Charcot–Marie–Tooth disease
Dejerine–Sottas disease
Hereditary spastic paraplegia
Amyotrophic lateral sclerosis
Surfer's myelopathy