Medicine A 25-year old man with bilateral gynecomastia and multiple metastatic tumor nodules in both lung fields would most likely have primary cancer of the? A Bone marrow B Testicle C Kidney D Islets cells of the pancreas. 💡 Explanation A 25-year old man with bilateral gynecomastia and multiple metastatic tumor nodules in both lung fields would most likely have primary cancer of the? ✓ Correct Answer: B. Testicle