RT Journal Article SR Electronic T1 Severe mediastinitis caused by an infected bronchogenic cyst JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e253099 DO 10.1136/bcr-2022-253099 VO 16 IS 1 A1 Evangelos Koliakos A1 Evangelos Kalogiannis A1 Stefano Gussago A1 Michel Christodoulou YR 2023 UL http://casereports.bmj.com/content/16/1/e253099.abstract AB Bronchogenic cysts (BCs) are congenital foregut malformations and usually asymptomatic, thin-walled, incidentally diagnosed cysts which can be easily resected by a minimal invasive approach at this time point. However, they may develop symptoms such as infection, bleeding or compression of adjacent structures. There is no consensus about the risk of developing complications during a lifetime; however, recent reports suggest a higher incidence than initially believed. Here, we report a case of severe life-threatening mediastinitis emerging from an infected BC requiring complex surgery, which could have been avoided if surgery had been performed at an early, asymptomatic stage.