(A) Diagram-rated classic CTS for both hands; nerve conduction tests confirmed bilateral CTS. (B) Diagram-rated probable because of palmar symptoms; nerve conduction tests revealed right CTS. (C) Diagram-rated unlikely; nerve conduction tests indicated left ulnar nerve entrapment.
CTS: carpal tunnel syndrome.
Redrawn with permission from Katz JN, Stirrat CR, Larson MG, et al. A self-administered hand symptom diagram for the diagnosis and epidemiologic study of carpal tunnel syndrome. J Rheumatol 1990; 17:1495.
