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Monotherapy with olaparib provides significant benefits over standard therapy in patients with a germline BRCA mutation and human epidermal growth factor receptor 2 (HER2) negative metastatic breast cancer, who had two or fewer previous chemotherapeutic regimens for metastatic disease. Olaparib was approved on July 2, 2018, in Japan for the treatment of patients with metastatic breast cancer with a BRCA mutation and HER2-negative status. Thus, the current experience with this drug is relatively limited. In this article, we report a case of luminal-type metastatic breast cancer harboring a BRCA1 mutation detected through BRACAnalysis (Myriad Genetics). Despite the late-line treatment, in this patient, olaparib was effective against metastatic breast cancer. [ABSTRACT FROM AUTHOR]

Objective: A dose escalation study of biweekly irinotecan (CPT-11) combined with capecitabine was performed to determine the maximum tolerated dose (MTD) and recommended dose (RD) for metastatic breast cancer (MBC) previously treated with anthracyclines and taxanes. Methods: Escalating doses of CPT-11 (80-120 mg/m2) were administered on days 1 and 15. Capecitabine was administered at a fixed dose of 1,657 mg/m2/day for 21 consecutive days, followed by 7 days of rest. We treated 3-6 patients at a particular dose level until the MTD was determined. Results: Twenty patients were treated. The MTD was determined to be 100 mg/m2, as 3 of 6 patients developed dose-limiting toxicities, grade 3 leukopenia, neutropenia, photophobia, fatigue and diarrhea. The RD for the phase II study was thus determined to be 90 mg/m2. The response rate was 41.7%. Conclusions: Combination therapy with CPT-11 and capecitabine was well tolerated with a promising response rate for MBC that had been treated previously with anthracyclines and taxanes. A multi-center phase II study is warranted to evaluate the efficacy and safety of this combination therapy with pharmacokinetic assessment. © 2014 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]