Cancers de l’ovaire BRCA muté : consultation d’oncogénétique et prescription des inhibiteurs de PARP

Abstract

GENETIC COUNSELING AND PARP INHIBITORS PRESCRIPTION: Upon the availability of the PARP inhibitors in relapsed ovarian carcinoma, the pathways of the oncogenetic counseling were modified. Any research for a constitutional alteration of the BRCA1 and BRCA2 genes must be accompanied by an oncogenetic counseling. BRCA testing is recommended from the diagnosis to every woman with an ovarian or fallopian tube or peritoneum of high grade adenocarcinoma, whatever the age at the diagnosis and her family history. In case of sensitive relapse or potential inclusion in a clinical trial and in the absence of preliminary constitutional research, the oncogenetic counseling is organized according to a fast track pathway and a somatic analysis can be realized in parallel. Today, olaparib is indicated for patients with a high grade serous ovarian or fallopian tube or peritoneum adenocarcinoma, with deleterious mutation of BRCA genes (constitutional or somatic), and in sensitive platinum relapse, and in maintenance therapy after a response to chemotherapy including platinum. The indication of a treatment with olaparib can be discussed in multidisciplinary staff for the other non-serous high grade ovarian carcinoma if all other criteria are gathered. Olaparib is prescribed in monotherapy, to start at the latest 8 weeks after the last chemotherapy cycle, under narrow surveillance, because of its gastrointestinal and hematologic toxicities.