Extralobar pulmonary sequestration presenting as an anterior mediastinal tumor in an adult.

Extralobar pulmonary sequestration (EPS) is a rather uncommon congenital anomaly. Most patients are diagnosed in their early life or during the first decade because of the early appearance of symptoms, including feeding difficulty, cyanosis, and dyspnea, or because of symptoms arising from the associated congenital abnormalities. Extralobar pulmonary sequestration is more often found between the lower lobe and the diaphragm and is usually associated with other congenital abnormalities, but the case reported herein differs in these respects. In this report, an incidental finding of EPS is described in a 30-year-old Chinese man, where EPS presents as an anterior mediastinal mass roentgenographically. The mass was attached to the right suprahilar region by a fibrovascular pedicle which contained a small elastic artery, veins, and nerve bundles.