Phase II study of THP (2''R)-4'-0-tetrahydropyranyladriamycin) in breast cancer]

In a phase II study of THP, fifty-six patients with advanced or recurrent breast cancer were evaluated, and a response rate of 23.2% including 1.8% with complete response and 21.4% with partial response, was obtained. Response rates of THP varied according to the location of metastasis and the highest rate was shown to be 38.5% in patients with soft tissue metastasis. The median dose for inducing response was 100 mg with a range from 60 mg to 160 mg. Toxicities such as leukopenia and gastrointestinal disorders were observed during THP treatment. The favorable response to THP was close to that of adriamycin, but it was noteworthy that a lower frequency of alopecia occurred.