CASO CLINICO : MEDICAL CASE

A patient 70 year old male had a CT of the head because of the headache in one part of the head. There was a mass in the left side of the brain and it is seen that the bone next to the mass was more thick that the other part of the skull.

Which is the most likely diagnosis?
a. Schwannoma
b. Astrocytoma
c. Meningioma
d. Tumor of pituitary gland