Conservative surgery for chondrosarcoma of the first metacarpal bone.

A rare case of a chondrosarcoma of the first metacarpal bone is presented. The lesion was radiographically interpreted initially as an enchondroma and treated conventionally by curettage and cancellous autologous bone grafting. After final histology, a low-grade chondrosarcoma was reported. A resection of the entire first metacarpal bone was performed, followed by reconstruction using an autologous corticocancellous bone graft and plate fixation, creating arthrodeses of the adjacent joints. Although isolated enchondromas are considered to have no malignant potential, histological examination is essential to rule out malignancy. A preoperative biopsy should be recommended in lesions suspected to be chondromas. Chondrosarcomas are rarely located in bones of the hand, where they are usually treated by amputation. With the case presented we wish to advocate that cases of low-grade, intraosseous chondrosarcoma (stage IA) can be treated by conservative surgery, especially when it is located in the thumb.