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En Bloc Resection of Tumors of the Distal End of the Ulna*†
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Investigation performed at the Department of Orthopedics, Mayo Clinic and Mayo Foundation, Rochester
J Bone Joint Surg Am, 1997 Mar 01;79(3):406-12
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The operative treatment of malignant tumors and aggressive benign tumors involving the distal end of the ulna often necessitates en bloc resection. The oncological and functional results for eight patients in whom a neoplasm involving the distal end of the ulna had been treated with en bloc resection without reconstruction of the osseous defect were reviewed retrospectively at a mean of seventy-nine months (range, twenty-three to 271 months). Four patients had a giant-cell tumor; two, a low-grade osteogenic sarcoma; one, a hemangioendothelioma; and one, a soft-tissue epithelioid sarcoma with osseous involvement. The amount of bone that was removed from the distal end of the ulna ranged from 3.1 to 9.0 centimeters. In the four patients who had a malignant tumor, a minimum of 7.5 centimeters was removed in order to achieve an adequate wide margin proximally. In the patients who had a benign tumor, a maximum of 6.6 centimeters was resected. Extraperiosteal resection was performed in three of the patients who had a malignant tumor and in one of the patients who had an aggressive giant-cell tumor. Subperiosteal resection was performed in the three patients who had a benign tumor and in one patient who had a parosteal osteogenic sarcoma. None of the patients had local or systemic evidence of recurrence of the tumor. The functional result was excellent for six patients and good for two. Grip strength was reduced by a mean of 15 per cent compared with the strength on the contralateral side, and this reduction did not appear to be related directly to the amount of bone that had been resected. The findings of this study support the concept that routine reconstruction of the osseous defect is not necessary after en bloc resection of a neoplasm of the distal end of the ulna.

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    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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