| A form of hereditary spastic paraplegia presenting with either a pure spastic paraplegia phenotype, usually in the first or second decade of life, with spastic lower extremities, unsteady spastic gait, hyperreflexia and extensor plantar responses, or as a complicated phenotype with the additional manifestations of distal wasting, saccadic ocular movements, mild cerebellar ataxia and mild, distal, axonal neuropathy. |
