Occurs in a wide age range, although mostly in older adults (>60 years old).
May present as a large painful scrotal mass.
Gross: white gray infiltrative mass centered at the testicular hilum.
Solid, papillary, or tubulopapillary growths in a desmoplastic stroma.
Nuclear stratification, moderate to marked pleomorphism, and with frequent mitosis.
Key to diagnosis is to see transitions from normal rete testis epithelium to adenocarcinoma.
Poor prognosis with advanced disease.