This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra & Penis, Subject name: Surgery
[{'content': 'Testicular hypoechoic mass with back pain in a patient of age 30 years. Best tumor marker? \nSelect and explain. \nA. AFP, B. Calcitonin, C. CA 19-9, D. CEA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) AFPRef: Campbell 11th Edition, Page 790* Seminomas occurs at a later age (40 years) compared to non seminomas (<40 years)* Non seminomatous tumors appear as Hypoechoic mass lesion in Testis.* Chevasu maneuver is the method of taking biopsy (Trans-scrotal biopsy is contraindicated)* Tumor markers for Non seminomatous tumors are - AFP and HCG.', 'role': 'assistant'}]