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  • Title: Osteogenic sarcoma of the extremity with detectable lung metastases at presentation. Results of treatment of 23 patients with chemotherapy followed by simultaneous resection of primary and metastatic lesions.
    Author: Bacci G, Mercuri M, Briccoli A, Ferrari S, Bertoni F, Donati D, Monti C, Zanoni A, Forni C, Manfrini M.
    Journal: Cancer; 1997 Jan 15; 79(2):245-54. PubMed ID: 9010097.
    Abstract:
    BACKGROUND: In the past 20 years, it has been demonstrated that the combination of surgery and chemotherapy improves the prognosis for patients with osteosarcoma of the extremity without detectable metastases at presentation. By contrast, the efficacy of chemotherapy coupled with aggressive surgery has not yet been well established for patients with metastatic disease at diagnosis. The current study evaluates the efficacy of chemotherapy associated with simultaneous surgery of primary and metastatic lesions in patients presenting with osteosarcoma of the extremity with lung metastases. METHODS: Patients with lung metastases originating from an osteosarcoma of the extremity received chemotherapy (high dose methotrexate, cisplatin, doxorubicin, and ifosfamide) followed by simultaneous resection of primary and metastatic lesions and additional chemotherapy. RESULTS: Between January 1993 and June 1995, 23 patients entered the study. After primary chemotherapy, lung metastases disappeared in three patients, whereas in four patients they remained surgically unresectable. All seven patients received surgical treatment of the primary tumor only. In the remaining 16 patients, a simultaneous resection of the primary and metastatic tumors was performed after chemotherapy. The resection of metastatic lesions resulted in a complete remission in 15 patients and an incomplete remission in 1 patient. All five patients who never achieved tumor free status died within a few months. Of the 18 patients who achieved radiologic remission at a 30-month follow-up (range, 14-50 months), 10 (55.5%) remained continuously free of disease, 7 relapsed with new metastases, and 1 died of toxicity. In 13 of the 18 patients who underwent a complete simultaneous resection of the primary and the metastatic lesions, or whose pulmonary metastases disappeared after chemotherapy, a strong correlation was found between degree of necrosis of the primary tumor and of the metastatic tumor. CONCLUSIONS: In patients presenting with osteosarcoma of the extremity with lung metastases, the combination of aggressive chemotherapy with simultaneous resection of the primary and metastatic lesions improves traditionally negative outcomes. The strong correlation found between the histologic response of the primary and metastatic tumors supports the strategy, largely used currently in the neoadjuvant treatment of osteosarcoma, of tailoring postoperative chemotherapy on the basis of the histologic response of the primary tumor to preoperative chemotherapy.
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