This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Surgery
MRI is the investigation of choice in all of the following except: 
Select and explain. 
A. Syringomyelia, B. Brain stem tumors, C. Skull bone tumors, D. Multiple sclerosis
C: Skull bone tumors
Answer: C: Skull bone tumors 
Explanation: Ans. (c) Skull bone tumors* MRI is best for soft tissue tumors* CT is best for Bone tumors* Imaging modality of choice to detect cerebral necrosis - PET scan.* IOC for Leptomeningeal Carcinomatosis-Gadolinium enhanced MRI