Adenomatoid Tumor

Adenomatoid Tumor •Electron photomicrograph of tumor cells lining a luminal space showing abundant long delicate microvilli. •This ultrastructural feature is characteristic of mesothelial cells. •Adenomatoid tumors of the epididymis are believed to be benign mesotheliomas. •The arrow points to focal presence of basement membrane material at the stromal interface. (Description By:H. Yamase, M.D. ) (Image Contrib. by: UCHC )