buparlisib and Metaplasia

Metaplastic carcinoma of the breast (MCB) is a rare cancer characterized by the histologic presence of two or more histological cell types originating from epithelial and mesenchymal stem cells. Patients with metastatic MCB have a low response rate to conventional chemotherapy and poor survival. Optimal treatment strategies for metastatic MCB are urgently needed.. We retrospectively reviewed a patient who had enrolled in the phase II/III seamless study, BELLE-4 (NCT01572727). The patient's response to the study drug assessed by an investigator per protocol and clinical course were examined and compared with those of the main cohorts in the BELLE-4 study.. Buparlisib plus weekly paclitaxel might be a new treatment option for patients with metastatic MCB harboring a PIK3CA mutation. Additional prospective studies for investigating the efficacy of the proposed combination are warranted.

Topics: Aged, 80 and over; Aminopyridines; Antineoplastic Combined Chemotherapy Protocols; Breast Neoplasms; Carcinoma; Female; Humans; Metaplasia; Morpholines; Paclitaxel; Phosphoinositide-3 Kinase Inhibitors; Randomized Controlled Trials as Topic; Tomography, X-Ray Computed; Treatment Outcome