My sister and mother were in a car wreck and as part of the dr visits they did an mri/cat scan of her head and neck. I know it is in the brain so I dont need to know where it is. But what does it do. The drs assistant called and said they needed to see her asap and it had to do with her pituitary gland. But she could not go into detail. In the meantime my mom is scared. What does it do? I have been all over the web and its in such medical mumbo jumbo I cant understand it. Without being mean, could you please tell me in terms a person who does not speak dr will understand.