Tendon rupture of the flexor digitorum profundus of the little finger secondary to hamate non-union.

Several cases of hamate fracture and non-union have been reported. The hook of the hamate acts as a pulley for the flexor tendons for the little and ring fingers. Hamate non-union is frequently associated with irritation of the adjacent soft tissues. We report the case of hamate non-union that was only detected because of a flexor digitorum profundus tendon rupture in the little finger, associated with tendinopathy of both flexor tendons of the ring finger.