Epididymal Adenomatoid Tumor: A Very Rare Paratesticular Tumor of Childhood

Abstract

Adenomatoid tumor is an uncommon benign mesothelial neoplasm, usually localized in the epididymis. It is the most common paratesticular tumor of middle-aged patients (average age of clinical presentation: 36 years). However, these tumors in pediatric and pubertal patients are extremely rare. Due to their rarity, we present a case of adenomatoid tumor of the tail of the epididymis in a 16-year-old patient. After systematic research of the current literature, we did not find another case report of epididymal adenomatoid tumor in a male patient aged 16 years old or less. This notice and our concern, as well, about the patient's surveillance protocol during the postoperative period were the motive for this case study.

Figure 1

Solid hypoperfused, hyperechoic, 1.3 × 1.1 cm in size mass localized at the tail of the epididymis. Notice the 2 small hypoechoic lesions inside the mass.

Figure 2

Yellowish uncapsulated mass (arrow) with maximum diameter of 13 mm located next to the tail of the epididymis.

Figure 3

Adenomatoid tumor. Multiple irregular spaces (vacuolated cytoplasm) coated by a layer of flat or cuboidal epithelial cells and surrounded by collagenous stroma and muscle fibers (H-E 10x).