Journal of Research in Medical Sciences1735-199591200402015253Department of Pathology, Isfahan University of Medical Sciences, Isfahan, IranDepartment of Pathology, Isfahan University of Medical Sciences, Isfahan, Iran20070217Mesothelioma is often diagnosed as a malignant scrotal mass without pain or inflammatory signs. It is a very rare tumor with quite uncommon sites of involvement. This form of malignancy generally involves pleura, with a differential diagnosis of undifferentiated carcinoma expectable in this area related to epididymis and rete testis. Keywords: Malignant mesothelioma, Scrotal masshttp://jrms.mui.ac.ir/index.php/jrms/article/view/882http://jrms.mui.ac.ir/index.php/jrms/article/download/882/215