This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Anatomy
A 50-yr-old male presents with a hard scrotal swelling. All of the following can be done EXCEPT 
Select and explain. 
A. Chest xray, B. Ct abdomen, C. Inguinal exploration, D. Testicular biopsy
D: Testicular biopsy
Answer: D: Testicular biopsy 
Explanation: A testicular biopsy (more specifically a trans-scrotal testicular biopsy) is not done, rather is contraindicated. A suspected scrotal mass is investigated by ultrasonography & on finding a testicular mass, a radical inguinal orchiectomy is done. A trans-scrotal testicular biopsy would breach anatomical barriers and would spread the tumor.