This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiology Q Bank, Subject name: Radiology
[{'content': 'A 34 years old man came with c/o blurring of vision in bilateral eyes and headache for past 6 months with decrease in libido. On examination, bitemporal hemianopia is seen. MRI was performed and shown below. Diagnosis is- \nSelect and explain. \nA. Pituitary macroadenoma, B. Pituitary microadenoma, C. Meningioma, D. Hemangioma', 'role': 'user'}, {'content': "Answer: A \nExplanation: Pituitary macroadenoma- size more than 10mm. 'Figure of 8' appearance is seen on MRI. Pituitary microadenoma - size less than 10mm. It shows delayed enhancement on dynamic contrast enhanced MRI as compared to normal pituitary gland .", 'role': 'assistant'}]