The seminal vesicle (SV) mucosa can show epithelial and stromal tumors. The epithelial tumors include both cystadenoma and carcinomas, adenocarcinoma being the most common. Squamous carcinoma may arise in the SV (1). Rarely mixed epithelial and stromal tumors (MESTs) can occur. Incipient lesions, i.e., primary precursor or preinvasive lesions giving rise to such tumors in the mucosa of the SVs, have been observed in anecdotal cases.
