Sensory signs and symptoms in scapuloperoneal atrophy: a report of a family.

A Norwegian family with asymmetrical scapuloperoneal atrophy is described. Chronic, aching shoulder pain, slight proximal and distal sensory dysfunction, and atrophy of the extensor digitorum brevis muscle occurred in some individuals. The proband had slightly impaired sensory conduction velocity, and his father exhibited impaired position sense and a vibration threshold asymmetry. EMG and muscle biopsy findings were equivocal. The syndrome is probably of neurogenic origin. It may be classified as a variant of Davidenkow's syndrome.