Reconstruction of an entire metacarpal and metacarpophalangeal joint using a fibular osteocutaneous free flap and silicone arthroplasty.

Abstract

Radical resection of the entire ring finger metacarpal for a giant cell tumor resulted in a bony defect extending from the distal surface of the hamate to the proximal surface of the proximal phalanx. We reconstructed the metacarpal with a custom-contoured free fibular osteocutaneous flap and maintained motion at the new fibulophalangeal joint using a silicone arthroplasty. At 4.5 years postoperatively, the patient has shown no signs of recurrence of the giant cell tumor. The silicone arthroplasty has maintained 15° to 85° of motion at the new joint. Because of its similar shape to a metacarpal and because it allows faster bony healing compared with a nonvascularized fibular bone graft, a free vascularized fibular bone graft is an ideal candidate for reconstruction of extensive defects of the metacarpals, and placement of a silicone spacer in its distal medullary cavity can preserve motion at the new metacarpophalangeal joint.