Exam 19: Male Reproductive System

A 28 year old man sees his GP about a 2 cm firm mass in his right testis.The GP examines it and recommends immediate removal of the tumour.The testis and spermatic cord are surgically removed shortly thereafter,and a representative section of the tumour is shown in the accompanying photomicrograph.Which one of the following is the best diagnosis?

A 55 year old man consults his GP for trouble with urination.He has difficulty both starting and stopping his stream.He often has to get up 2-3 times per night to urinate.The physician palpates a nodular prostate,and a needle biopsy is performed,to rule out carcinoma.A representative section is shown in the accompanying photomicrograph.Which one of the following is the best diagnosis?