Concomitant Chemoradiotherapy Followed by Adjuvant Chemotherapy in Parotid Gland Undifferentiated Carcinoma

Abstract

Aims and background Undifferentiated carcinoma of the parotid gland is a poor-prognosis lesion. Results in unresectable lesions, treated with radiotherapy alone, are very disappointing. Methods Six patients with T3-4 N0-1 inoperable lesions were treated with conventional radiotherapy (64-70 Gy, 2 Gy per fraction 5 times a week) and concomitant cisplatin (100 mg/m2, days 1, 22 and 43). Four weeks after radiotherapy, adjuvant chemotherapy (cisplatin, 80 mg/m2, day 1, + VP16, 100 mg/m2, days 1, 3 and 5, q = 3 weeks, for 3 cycles) was given. Results A median dose of 66 Gy (range, 64-70 Gy) was delivered, and all patients recived 3 courses of cisplatin during radiotherapy. Five of 6 patients recived all three chemotherapeutic adjuvant courses. Two months after the end of treatment, 3 CR (50%), 2 PR (33%) and 1 NC (16%) was observed. Median CR and PR duration was 26+ and 10 months, respectively. Median overall survival was 18 months. No severe acute or late toxicity was observed. Conclusions Concomitant chemoradiotherapy followed by adjuvant chemotherapy in advanced unresectable undifferentiated parotid carcinoma is feasibile and well tolerated. The high percentage of long-lasting CR is encouraging.