famea,
Do you mean he has sclerosis of the hip? Cirrhosis is a disease that affects the liver. Sclerosis is one of the components of degenerative changes within a joint.
Orthopedic surgery is usually considered to elective. So, no one should feel forced to have surgery.
You do not mention what his symptoms are, pain, limp, decreased range of motion, etc. The aim of most surgery in to alleviate a patient's symptoms or at least reduce them.
In most of the degenerative processes about the joints, whether caused by trauma or aging, do not get better on their own. They may remain static for many years though. But, eventually, they usually do get worse.
So, it is up to your brother, depending upon how badly his symptoms affect his life, as to whether or not he wants to have surgery.
Good luck.