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A 36-year-old man who suffers from gait disturbance is reported. He noticed deformity of his feet at the age of 15. When he was 32 years old, he complained of heaviness in his lower extremities. Since then his legs have been always stiff. He had no previous illness or familial neuromuscular diseases. Neurological examination revealed no impairment of mental function or cranial nerves. Marked weakness and wasting of the feet were noted. The legs showed an inverted champagne bottle shape and pes cavus deformity was evident. Deep tendon reflexes were normal in the arms but abnormally brisk in the legs. Bilateral Babinski sign and ankle clonus were elicited. The patient tended to walk on his toes and the legs scissored. The motor nerve velocities were less than normal. Sural nerve biopsy showed reduced myelinated fiber density and increased endoneurial connective tissue. Electron microscopy showed axonal swellings filled with neurofilaments. Distal wasting and weakness involving the legs more than the arms resembled that of Charcot-Marie-Tooth disease. According to the classification by Dyck, this disorder could be referred to as hereditary motor and sensory neuropathy type V. Spastic paraplegia with amyotrophy is rare, but should be identified as a distinct disorder. Recognition of this disorder would imply the clinical and genetic heterogeneity of Charcot-Marie-Tooth disease.

Spastic Paraplegia with Amyotrophy of the Legs: A Rare Case of Motor and Sensory Neuropathy.