Carpal tunnel syndrome in patient with hemihypertrophy: case report.

Carpal tunnel syndrome is a common condition; however, it has not been previously reported in patients with hemihypertrophy. A 67-year-old woman with left-sided hemihypertrophy presented with carpal tunnel syndrome of the left hand. Magnetic resonance imaging showed enlargement of the median nerve proximal to the transverse carpal ligament. Carpal tunnel decompression was performed, and pain was immediately relieved by decompression of the carpal tunnel. At the six-month follow-up examination, the patient experienced relief from numbness and improvement in thenar muscle atrophy was noted.