Well, it would be difficult to comment specifically on the situation without knowing the relevant clinical details such as the severity of the issues or having a look at the actual images. The changes suggest inflammation and degeneration of the joint; though a review surgery may not be required at this time, there may be a risk of further degeneration. Typically conservative management with rest, anti-inflammatory medications and physiotherapy to strengthen the muscles around the knee joint would be advised, in the situation. I would suggest discussing the situation, expected prognosis and the management plan in detail with your treating orthopedician.
Hope this is helpful.