AUTHOR=Fukudome Yuya , Hieda Michinari , Masui Shiho , Yokoyama Taku , Futami Shutaro , Moriyama Shohei , Irie Kei , Fukata Mitsuhiro , Ushijima Tomoki , Shiose Akira , Akashi Koichi TITLE=Case Report: Bronchogenic Cyst in the Right Atrium of a Young Woman JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=Volume 9 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2022.915876 DOI=10.3389/fcvm.2022.915876 ISSN=2297-055X ABSTRACT=A 31-year-old woman was referred for evaluation of a cardiac mass in the right atrium. Cardiac magnetic resonance imaging indicated the presence of a cystic mass with fluid accumulation in the right atrium. The mass was diagnosed as a cardiac cyst and was surgically removed. Pathological examination revealed that the cyst was an extremely rare bronchogenic cyst. Bronchogenic cysts are benign congenital cysts of primitive foregut origin that form in the mediastinum during embryonic development. There is a clinical dilemma surrounding the treatment plan for cardiac surgery or biopsy of the cardiac mass, especially in patients with rare cardiac cysts. The anatomical location of the cyst is related to various clinical symptoms and complications. In cases of indeterminate cardiac cysts, direct removal of the cyst without previous biopsy is of utmost importance.