[Phase II study of (2''R)-4'-O-tetrahydropyranyladriamycin (THP) in patients with solid tumors. Multi-Institutional Cooperative Study].

A Phase II Study of (2''R)-4'-O-tetrahydropyranyladriamycin (THP) in patients with various solid tumors was carried out by 44 cooperative study institutions. Seven hundred fifty-six patients administered the drug intravenously were entered into this study. Of these, 499 patients were evaluated for objective responses. THP was given mainly at a dose of 40 to 60 mg/body every 3 to 4 weeks or 20 to 30 mg/body once a week. Response rates were 18.8% for head and neck cancer, 13.1% for stomach cancer, 21.4% for breast cancer, 22.2% for bladder cancer, 30% for renal pelvic and urinary tract tumor, 26.8% for ovarian cancer and 24.2% for uterine cancer. Overall response rate was 15.4% including 10 complete responses and 67 partial responses. Adverse reactions were similar to those previously reported in the phase I study, including gastrointestinal toxicities and myelosuppression. Alopecia and stomatitis, which are major side effects of other anthracyclines, were rather mild. Incidence of ECG changes was 2.8% and no congestive heart failure was observed.