PATIENT CHARACTERISTICS: Age: 18 and over Sex: Female Menopausal status: Not specified Performance status: Not specified Life expectancy: Not specified Hematopoietic: Absolute neutrophil count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hemoglobin at least 10 g/dL Hepatic: Bilirubin less than 1.5 times upper limit of normal (ULN) AST no greater than 3 times ULN Alkaline phosphatase less than 2 times ULN unless arising from bone Renal: Creatinine less than 1.5 times ULN Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception No other clinically significant disease that would interfere with study evaluations No uncontrolled vomiting that would preclude administration of oral medications HIV negative