Adenomatoid tumor of the pleura

We report a case of an adenomatoid tumor of particular location within the pleura, incidentally discovered on a pulmonary lobectomy specimen after sur gical resection of a pulmonary squamous cell carcinoma. This adenomatoid tu mor appeared as a unique pleural mass located away from the primary carcino ma and consisted of a cellular proliferation organised in tubes and sheets. Adenomatoid tumors are consider ed as benign tumors of mesothelial nature. Their morphological and immunohistochemical features in association with t heir location to the pleura, warrant a precise analysis to eliminate malign ant tumours such as malignant mesothelioma or metastatic adenocarcinoma.