[Pulmonary lymphoepithelioma-like carcinoma; report of a case].

A 66-year-old male was referred to our hospital due to an abnormal chest shadow in the left lung detected on a medical examination. Chest computed tomography(CT) revealed a round mass of 40 mm in diameter in the left S10. Positron emission tomography (PET) scan showed fluorodeoxy glucose (FDG) accumulation and surgical biopsy was done. The intraoperative frozen histopathological diagnosis was mucosal associated lymphoid tissue( MALT) lymphoma or pseudoinflammatory tumor. By postoperative pathology, the mass was finally diagnosis as lymphoepithelioma-like carcinoma (LELC) of the lung, pT2aN0M0 stage I B.After a month, left lower lobectomy with mediastinal lymph node dissection was performed. The association with Epstein-Barr virus was not demonstrated by EBER in situ hybridization. The patient was well without relapse at 24 months after surgery.