Interphalangeal Sesamoid Bone as a Rare Cause of Bilateral Trigger Thumb

Triggering of the thumb is a well-known condition in the current orthopaedic practice.Although most cases of triggering are idiopathic, some are caused by specific anomalies.We present a rare case of atraumatic, bilateral triggering of the thumb caused by a congenital sesamoid bone at the volar aspect of the interphalangeal joint.Sesamoidectomy resulted in immediate and sustained resolution of pain and clicking.In this article, we discuss a step-by-step surgical approach for sesamoidectomy while reviewing the more uncommon causes of triggering.We argue that a broad spectrum of etiologies should be included in the differential diagnosis when opting for surgery in the treatment of trigger thumb.