A 63-year-old man comes to your office after suffering from 2 months of new headaches, which do not resolve with OTC analgesics. A CT of the brain shows multiple enhancing lesions in both cerebral...

A 63-year-old man comes to your office after suffering from 2 months of new headaches, which do not resolve with OTC analgesics. A CT of the brain shows multiple enhancing lesions in both cerebral hemispheres. What is your preliminary diagnosis?

A. GBM

B. Pilocytic astrocytoma