A Successful Multimodal Treatment for High-Grade Serous Ovarian Cancer with BRCA2 Heterozygous Deletion with Multiple...

Management of recurrent high-grade serous ovarian cancer (HGSOC) remains a challenge. This case presents a successful multimodal treatment plan in a BRCA-mutated patient with repeated recurrences.

A 60-year-old woman diagnosed with FIGO stage III HGSOC received initial debulking surgery followed by chemotherapy at another hospital in December 2017. The patient presented to our institution in March 2019 for further management because of a suboptimal response to 2nd-line chemotherapy. A disseminated disease extent was identified. She progressed (new bone metastasis) during the 3rd- to 5th-line platinum-based chemotherapy, but achieved complete remission after changing to pembrolizumab and weekly paclitaxel. She had a 3rd relapse at the anterior mediastinum (proven by thoracoscopic resection in April 2020, and the tumor was found to harbor a BRCA2 heterozygous deletion), which was controlled by adjuvant radiotherapy combined with nivolumab and nab-paclitaxel, followed by maintenance therapy nivolumab plus olaparib, and eventually olaparib monotherapy. A 4th recurrence at the perigastric lymph nodes was found through periodic positron emission tomography surveillance with normal CA-125 in September 2021. Resection of metastasis and hyperthermic intraperitoneal chemotherapy (HIPEC) were performed, and maintenance therapy was again with olaparib. She has maintained remission since then.

A durable remission is possible by multimodality management, including the strategic use of chemo-immunotherapy, localized resection plus HIPEC/adjuvant radiotherapy, and poly (ADP-ribose) polymerase (PARP) inhibitor maintenance, in BRCAm-HGSOC with multiple recurrences.