[A case of huge submandibular malignant tumor treated successfully with UFT chemotherapy].

We report a patient with a huge submandibular malignant tumor showing an excellent response to chemotherapy with UFT. A 76-year-old woman complaining of a submandibular mass was referred to us. The mass had an irregular margin and measured 11 x 7 cm on CT scan. A left submandibular lymph node was enlarged slightly. Fine needle aspiration cytology of the mass indicated undifferentiated malignant tumor. We diagnosed her with unresectable malignant tumor. She was treated with oral UFT (600 mg/day), as she refused chemoradiotherapy. The malignant tumor became dramatically smaller in 4 weeks, and clinically disappeared in 6 weeks. Oral UFT was discontinued due to liver dysfunction. There has been no evidence of recurrence for 5 years after discontinuation of chemotherapy. The patient remains under observation.