Figure 2

Histological and immunohistochemical features of malignant mesothelioma of the tunica vaginalis testis. (A) The tumor cells are rounded or cuboidal with nuclear atypia, prominent nucleoli and a diffuse infiltrating pattern (haematoxylin and eosin stain × 100); (B) positive for cytokeratin stain; (C) positive for calretenin stain; (D) negative for CEA stain.