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Trochanteric sciatic neuropathy

From the Department of Neurology (Drs. Crisci, Baker, Litchy, and Dyck) and the Department of Orthopedics (Dr. Wood), Mayo Clinic and Mayo Foundation, Rochester, MN. Dr. Baker was a Visiting Scientist.

A patient with severe weakness, atrophy, and sensory loss of the right leg had a focal right sciatic neuropathy. The sciatic nerve was enlarged at the level of the lesser trochanter, excessively firm, and multistranded; its stimulation threshold was focally increased. Biopsied fascicles had reduplicated perineurial leaflets, many Renaut bodies, and an abnormal unimodal spectrum of small-diameter fibers. We postulate that the lesion was induced by the combination of an underlying prominent lesser trochanter and sitting on hard benches.

Address correspondence and reprint requests to Dr. Dyck, Mayo Clinic, 200 First Street SW, Rochester, MN 55905.

Supported in part by the Fondazione Clinica Del Lavoro, Italy.

Received March 28, 1989. Accepted for publication in final form May 25, 1989.

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