Image Description
The tumor is composed of low cuboidal or flattened cells arranged in solid cords, nests, glandular spaces, or slit-like tubules within a fibrous stroma. The cells have a small vesicular nucleus lacking any appreciable atypia, punctate nucleolus and eosinophilic cytoplasm. Intracytoplasmic vacuoles may be prominent and create a resemblance to signet ring-cells or fat cells. Differential diagnosis of adenomatoid tumor includes: metastatic carcinoma, malignant mesothelioma, and carcinoma of the rete testis.
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.