Snapping thumb: a rare case of stenosing tenosynovitis of the extensor pollicis longus tendon

Tenosynovitis of the extensor pollicis longus (EPL) is rarely reported in patients without rheumatoid arthritis but may lead to thumb snapping as a consequence of EPL stenosing tenosynovitis. This case presents painful thumb snapping that developed after a wrist trauma and repetitive loading. Ultrasound and MRI were used as diagnostic tools, before surgical release of the EPL in the third extensor compartment was performed. Neither EPL tenosynovitis nor thumb snapping were found at follow-up.

Automated summary

This case demonstrates that wrist trauma and repetitive loading can lead to painful thumb snapping, with successful resolution post-surgical treatment.