Abstract
Giant cell tumors of the bone are benign but locally aggressive, and they rarely metastasize to the lungs. The purpose of this study was to retrospectively review the clinical presentation, long-term outcomes, and treatment of pulmonary metastasis of these tumors. Between 1991 and 2004, a total of 168 patients with giant cell tumors of the bone were treated at the authors' institution, 7 of whom developed lung metastasis. Four of the 7 patients were men, and mean age of these patients at initial surgery was 40 years (range, 19-56 years). All patients underwent wide excision and reconstruction or curettage and bone grafting for the bony lesions. Lung metastases were detected at a mean of 44 months after the treatment of bone lesions. Five patients had multiple metastases, and 2 had solitary pulmonary metastases. Six of these patients underwent delayed treatment, locally aggressive, or multiple recurrent and surgical procedures. All of the aforementioned procedures had similar risk factors to those previously reported in the literature. One patient had multiple giant cell tumors of the bone. At last follow-up, 2 patients had died due to complications from the pulmonary metastases or chemotherapy. One patient underwent a metastasectomy 4 years after treatment due to the progression of pulmonary metastasis. The remaining 4 patients were alive and healthy after chemotherapy or conservative treatment. Therefore, early detection, adequate treatment of the primary bone lesion, conservative treatment of lung metastases, and regular long-term follow-up are recommended.
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