The bone edema in the hip is usually associated with osteoarthritis and can be degenerative and affect the legs farther down in time.
It's very rare in someone of Robert's age.
It can be very, very painful and for someone as active as Timelord, needs to be managed.
I don't pretend to know anything in Williams's case. The team has been pretty mum on the subject. But, Stevens saying they were managing Timelord so that he can give them more in the playoffs, seems to me to say, it's something he will probably be dealing with for possibly his career.
Now, I could be completely wrong here and his hip is fine and he just has a knee issue not related to the hip, but he missed a game in February over hip pain and the knee issue is on the same side as the hip problem, soooooo.....