Abstract
A 5-year-old girl was referred to our unit with an incidental finding of a lesion
on the right hemithorax situated within the right atrial shadow. Computed tomography
thorax showed a well-defined soft tissue lesion felt to be consistent with a bronchogenic
cyst. The lesion was located in the posterior mediastinum, adherent to the diaphragm
and inferior vena cava, but did not extend within the wall of the esophagus. It was
entirely excised via video-assisted thoracoscopy converted to open thoracotomy. Histopathology
confirmed an encapsulated nodular tissue measuring 2.5 × 2.5 × 2 cm lined by squamous
type epithelium. Chronic inflammatory cells and foreign body giant cell reaction were
found in the cyst wall. The appearances were that of a benign epidermoid cyst.
Keywords
epidermoid cyst - pediatric - mediastinum
