Genetic medicine is accelerating in Japan.

Breast Cancer

Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka, 812-8582, Japan.

Published: July 2022

Background: In 2018, BRACAnalysis® was covered by medical insurance in Japan as a companion diagnostic test for the poly ADP-ribose polymerase inhibitor olaparib. In April 2020, eligibility for BRCA1/2 genetic testing was expanded to the diagnosis of hereditary breast and ovarian cancer syndrome, and medical management including prophylactic surgery and surveillance were covered by public insurance for BRCA1/2 mutation carriers who developed breast or ovarian cancer. The amount of BRCA1/2 genetic testing has been increasing recently, but the number of subjects and the impact of testing for patients' outcomes remain unclear.

Patients And Methods: This study explored the potential number of patients who will be eligible for new insurance coverage for BRCA1/2 genetic testing. We analyzed 868 patients from 938 surgeries between January 2014 and September 2020 from our database.

Results: Overall, 372 patients (43%) were eligible for new insurance coverage for BRCA1/2 genetic testing. The most common category was family history of breast or ovarian cancer within third-degree relatives. We found that 202 patients (23%) had family history of breast or ovarian cancer. In addition, the progression-free survival was significantly lower in triple-negative breast cancer patients aged 60 years or younger compared with the other patients (P = 0.0005).

Conclusion: The genetic medicine for primary breast cancer patients with BRCA1/2 germline mutation is accelerating rapidly in Japan. Therefore, establishing a system for the genetic medicine would be urgent.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9225975PMC
http://dx.doi.org/10.1007/s12282-022-01342-4DOI Listing

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