Ulna-minus variance and Kienböck's disease.

A 29-year-old woman meat wrapper with long-standing bilateral carpal tunnel syndrome had an incidental finding of severe unilateral ulna-minus variance caused by a childhood injury. Despite the strenuousness of the patient's occupation and the severity of the abnormality, there was no clinical or radiologic evidence of lunatomalacia (kienböck's disease) on the affected side, indicating that there is not necessarily a direct causal relationship between ulna-minus variance and lunatomalacia.