SplintER Series: A Rare Cause of Traumatic Thumb Pain

A 45 year-old male presents with right thumb pain and deformity after falling off his bicycle. You obtain hand x-rays and see the following images. What is the most likely diagnosis, differential diagnosis, and management plan?

trapeziometacarpal dislocation xray

Figure 1. AP and oblique views of the hand. Author’s own images.