It doesn't suggest that's there's anything notable going on, there's no specific mention of a cartilage defect so presumably there's been healing. There's some swelling around the fat pad which is often down to kneecap maltracking or overuse. Do you ice the knee?
Where in the knee was the mfx? When was the surgery? Where is the pain? What brings it on? What activities do you do?
What does your physiotherapist or surgeon suggest?