[Bony avulsion of the extensor carpi radialis longus tendon from the base of the second metacarpal: A rare injury].

We report on a 19-year-old male patient with a rare injury: a basis fracture of the second metacarpal with avulsion of the extensor carpi radialis longus (ECRL) tendon. The patient was treated with open reduction and internal plate fixation of the fragment. The functional results after 10 months of follow-up were pronation/supination 90/0/90° (90/0/90°), extension/flexion 70/0/70° (70/0/70°) radial/ulnar duction 20/0/40° (25/0/40°), bilateral grip strength was 115 kPa. The patient suffered no pain at all. The Mayo wrist score reached 100 points. Radiologically, the fracture was consolidated.Consistent diagnostics and surgical therapy lead to functional and radiological recovery following fracture of the second metacarpal base with avulsion of the extensor carpi radialis longus tendon.