The majority of mediastinal germ cell tumors are teratomas. Placement in the anterior mediastinum of the thorax is common, and placement in other compartments of the mediastinum and parenchyma can be observed as well. The main aim of treatment of mature and immature teratomas is complete removal of the mass without complications. Excision provides cure and its prognosis is very good. In this case, we aimed to disscuss the case of a 22-year-old patient with anterior mediastinal involvement, which was first thought to be an anterior cystic pericardial cyst and was determined to be a mature cystic teratoma during resection.
Corresponding Author: Ersoz Kose E.