Serous Carcinoma of the Testicle and the Paratesticular Tissue: Case Report and Literature Review.

Ovarian-type epithelial lesions of the testicle and the paratesticular tissue are uncommon, especially invasive serous adenocarcinoma with only 18 cases reported in the literature. Although the majority of these tumors occur in adults with an age range from 16 to 87 years, only 1 patient was less than 10 years old. Herein, we report only the second case of invasive serous adenocarcinoma occurring in the first decade of life, that of a 7-year-old boy. Additionally, clinical presentation, imaging, histopathology, immunohistochemistry, and clinical follow-up of invasive serous adenocarcinoma of the testicle are discussed, along with a review of the literature.