A Case of Mucoepidermoid Carcinoma Arising from the Wall of a Bronchogenic Cyst in the Lung

Abstract

A 27-year-old woman presented with abnormal findings during workplace chest X-ray screening. Chest contrast-enhanced CT scan and MRI revealed a 24 mm solitary cystic lesion continuous with the right middle lobe bronchus, that was diagnosed as a bronchogenic cyst. Six months later, a follow-up chest CT scan showed enlargement of the lesion. Considering the possibility of further association of intracystic infection and malignant disease, video-assisted thoracoscopic right middle lobe resection was performed. Intraoperative rapid pathological examination revealed a 6-mm nodule within the cyst. It was diagnosed as mucoepidermoid carcinoma and mediastinal lymph node dissection was added. The final pathological diagnosis was mucoepidermoid carcinoma arising from a bronchogenic cyst in the lung, pT1cN0M0, pStage IA3. At the current follow-up for 3 years postoperatively, no evident recurrence has been observed.