Trigger Wrist Associated with Carpal Tunnel Syndrome Caused by Flexor Digitorum Superficialis Muscle Belly Hypertrophy: A Case Report and Literature Review

Background: Trigger wrist is a rare disease with few reported cases in the literature. This condition presents with painful sensation and a clicking sound during finger or wrist movements. Case Report: In this report, we present a 32-year-old man suffering from trigger wrist along with carpal tunnel syndrome caused by muscle belly hypertrophy and extension to the carpal tunnel. The diagnostic approach and surgical techniques are explained. Conclusion: In cases of trigger wrist associated with carpal tunnel syndrome (CTS), there may be an underlying cause covering both the trigger wrist and CTS at the volar side of the wrist. Therefore, a precise clinical examination is recommended to avoid unnecessary surgery, releasing of A1 pulley, or steroid injection.

Carpal Tunnel Syndrome and Trigger Wrist Caused by Localized Amyloidosis: A Case Report

We report a case of carpal tunnel syndrome and trigger wrist caused by localized amyloidosis. A 37-year-old man, who worked as a manufacturer, presented with a 5-month history of tingling sensation in the three radial fingers of the left hand and a painful click at the volar aspect of the wrist during digital motion. We divided the transverse carpal ligament and detected diffuse tenosynovitis that was especially severe around the flexor digitorum profundus tendons. Histological findings led to a diagnosis of amyloidosis. Localized amyloidosis could thus be a cause of trigger wrist. Systemic amyloidosis may develop in patients with localized amyloidosis; therefore, patients with trigger wrist caused by flexor tenosynovitis should be investigated for the existence of localized amyloidosis, with biopsy of the flexor tenosynovium.