Background & objective: The response of adult soft tissue sarcoma (STS) to chemotherapy is uncertain. This study was to evaluate the role of chemotherapy in treating adult soft tissue sarcoma.
Methods: Clinical data of 109 adult soft tissue sarcoma patients, treated with chemotherapy at Cancer Center of Sun Yat-sen University from Jan. 2000 to Dec. 2005, were analyzed.
Results: Of the 109 patients, 66 received palliative chemotherapy, 40 received adjuvant chemotherapy, and 3 received neoadjuvant chemotherapy. The overall response rate for first line chemotherapy was 22.7%. The median survival was 16.9 months. The 1-and 2-year survival rates were 63.6% and 33.3%. The patients with lung metastasis had a significantly longer median survival than those with liver metastasis did (25.1 months vs. 11.8 months, P<0.05). MAID and CYVADIC were the most commonly used first-line chemotherapy regimens; the response rates were 28.0% and 22.2%, respectively. When anthracycline and/or standard dose ifosfamide failed, the patients could still benefit from high dose ifosfamide (14.0 g/m(2)). The median survival was significantly shorter in the patients who got metastasis within 6 months after diagnosis than in those that got metastasis more than 6 months after diagnosis (11.8 months vs. 42.9 months, P=0.04). Of the 40 patients who received adjuvant chemotherapy, 16 developed progression during follow-up: 10 had relapse and 6 had distant metastasis.
Conclusions: MAID and CYVADIC are two effective chemotherapy regimens for adult soft tissue sarcoma. We recommend to take a high dose ifosfamide when anthracycline and/or standard dose ifosfamide failed. The patients with liver metastasis are more resistant to chemotherapy than those with lung metastasis. Developing metastasis within 6 months after diagnosis is a poor prognostic factor.