Reason: evaluate for effusion vs lipoma at the left knee History: pain, swelling at left knee There is intrasubstance degeneration of the posterior horn of the medial meniscus. Some of the signal extends to the tibial articular surface with associated deformity of the posterior horn indicating degenerative tearing. The lateral meniscus appears intact. No full-thickness or near full-thickness articular cartilage defects are identified. There is a large fluid collection anterior to the patella with foci of low signal intensity internally which likely represents a prepatellar bursitis although a hematoma could be considered, particularly if there is a history of trauma. There are multiple internal septations. There is a small amount of fluid within the deep infrapatellar bursa which is not necessarily of any clinical significance.
Findings indicating a prepatellar bursitis. Other findings as described.