Arthritis.: Narrowing of the joint space on the medial side of the knee is usually the result of arthritis. It may be hereditary, or it can be a result of loss of cartilage from prior surgery. Surgery may be required, based on how badly it bothers you.
Answered 9/11/2015
4.3k views
Don't know what you: Mean by "diminished" or if you even have any discomfort. Have you previously injured it? Does it feel unstable, lock up or cause the knee to swell? Lots of questions need answering before answering yours. Why don't you have your doctor take a look?
Answered 9/11/2015
4.3k views
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