Hi, Thank you for providing the brief history of your brother. A thorough musculoskeletal assessment is advised. As your brother had undergone TKR, and he is having baker s cyst, why the cyst was ignored during the plan of the surgery. Usually, due to the formation of the cyst, there is venous insufficiency, i mean, the back flow of blood to the heart is restricted from the lower limbs. Now since everything is done and steroid is also failed, i will have something to workout here. I have seen, many patients with OA knee and bakers cyst. Now this bakers cyst can be get rid of through exercise and the venous insufficiency can be corrected as well. So, lets come to the point here. Your brothers age is 67, so we can expect his metabolism to be slow and the venous drainage to be slow as well. Getting the proper exercise done should help reduce the cyst and also the swelling too. The exercises to perform are - 1. Sit and stand in a chair - 100 times Begin this exercise by performing 25 and then a non stop to 100 when endurance improves. Having a sit adjustment is needed. Now what is his ROM of the operated knee is to be understood. If he has achieved 130 degrees of ROM of the operated knee than it will be good here. 2. ROM Achieve 130 degrees ROM of the operated knee, as this is very important for the joint Stability and mobility. 3. Squat Perform squat upto 50 in one go if the ROM is upto 130 degrees. Also, while performing Squat one has to hold the window or the railing to take the assistance. In my clinical practice i have seen Baker s cyst, swelling of lower limbs and OA issues to resolve with simple and accurate exercises. I wish your brother a good health Regards Jay Indravadan Patel