In a patient suspected of having suppurative flexor tenosynovitis of the thumb, which of the following signs is LEAST likely to be present?
|A||Pain on passive extension of the thumb|
|B||Slight flexion of the interphalangeal joint|
|C||Marked tenderness over the volar aspect of the thumb and thenar area|
|D||"Pointing" of the infection at the insertion of the flexor pollicis longus|
"Pointing" of the infection at the insertion of the flexor pollicis longus
The classic presentation of suppurative flexor tenosynovitis (Kanavel's four cardinal signs) is represented by choices A through D. Localization, or "pointing," of the infection is uncommon.