Main clinical signs and symptoms include: * headache * movement disorders * tremor * visual disturbances * abnormal EEG * Diplopia Patients with<unk>  and Cowden's syndrome may also have multiple growths on skin. The tumor, though benign, may cause neurological injury including abnormal movements. MICROSCOPY <unk>  1>Enlarged circumscribed cerebellar folia 2>internal granular layer is focally indistinct and is occupied by large ganglion cells 3>myelinated tracks in outer molecular layer 4>underlying white matter is atrophic and gliotic
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