Ulnar adamantinoma: en bloc excision and fibular osteoseptocutaneous free flap reconstruction.

Adamantinoma is a rare tumor of the appendicular skeleton, and only six cases of ulnar involvement have been reported. We present the case of a 58-year-old man who sustained a pathologic fracture of the proximal third of this right ulna. Biopsy at the time of intramedullary fixation revealed adamantinoma, and he was referred for treatment. There was no evidence of metastatic disease. At operation, the proximal 22 cm of ulna was excised en bloc and the defect reconstructed using a vascularized fibular osteoseptocutaneous flap. The postoperative course was uneventful, and the patient has remained free of disease with very good function 3 years later.