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
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- 
Select and explain. 
A. Pituitary macroadenoma, B. Pituitary microadenoma, C. Meningioma, D. Hemangioma
A: Pituitary macroadenoma
Answer: A: Pituitary macroadenoma 
Explanation: 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 .