Image Description
This adenomatoid tumor was largely composed of compressed tubules and slit-like spaces in a collagenous stroma. The diagnosis was not readily apparent at first on routine H&E sections. However, the location of the tumor, its gross appearance, and immunohistochemical findings (positivity for cytokeratin AE1/3 and calretinin) were helpful in arriving at the correct diagnosis.
About the Disease
Benign tumors of testicular adnexa include adenomatoid tumor (most common tumor of the epididymis), lipoma (most common tumor of the spermatic cord), papillary cystadenoma of the epididymis, leiomyoma, rhabdomyoma, hemangioma, lymphangioma, aggressive angiomyxoma and paraganglioma. Fibrous pseudotumor and smooth muscle hyperplasia of the testicular adnexa are entities reported in this region that mimic neoplasia clinically. Ovarian-type epithelial tumors (serous, mucinous, Brenner, endometrioid, and clear cell types) have also been described in paratesticular tissues.