Testicular germ cell tumor is the most common cancer in 20-to 35-years-old men. There are known risk factors such as undescended testicle(s) and history of testicular cancer. Most lesions are germ cell tumors with two main subtypes: seminomas and non-seminomatous germ cell tumors.
a) Microscopic view of the second retroperitoneal biopsy using placental alkaline phosphatase (PLAP) marker (arrow), magnifications x 10.9; b) Macroscopic view showing a scarred focus (arrow) corresponding to a regressed germ cell tumor; c) Microscopic view of the same testis demonstrating prominent lymphoplasmacytic infiltrate around the hyalinized fibrosis (arrow).
a) 57 years old patient; b) 41 years old patient; c) 34 years old patient; same patient as c) spontaneous decrease in size 4 weeks after the first CT.
