With all due respect I did mention in my additional details, that the pituitary gland is in the brain, and the infection from the dog bite is what lead to this very unfortunate infection involving his pituitary gland.
Pasteurella mutocida and pasteurell canis are bacterial organisms that lives in the months of dogs. When passed to humans through a bite it can lead to serious infection.
My friend thought he could treat himself on his own after the dog bite. He soon started to get serious headaches and other symptoms because he left the dog bite unattended when he should have seek medical treatment immediately (strong antibiotics for one). This poor lapse in judgement cause the infection to spread his brain that eventually attacked his pituitary gland and surrounding internal areas.
For those who don't know, such as yourself, a dog bite left untreated can cause very serious medical problems. An infection can develop as quick as 24 hours.
As far as, your other assumption, he will need the guidance of a pituitary specialist, an Endocrinologist, to ensure he has all the necessary hormones that would function as the pituitary gland would naturally for the rest of his life. Otherwise fatal. Yes, that would include testosterone. He doesn't know how all this will affect his life or love life yet. My advice t him is to talk to his Dr regarding all concerns.
I was hoping to find someone who may have had a similar experience. No guessing.