Synovial lipomatosis: A rare cause of knee pain in an adolescent female

Figure 3 Descriptions of benign synovial tissue and fragments of adipose present beneath the synovial surface. A: Villous and nodular fatty projections common in synovial lipomatosis (Hematoxylin/eosin, 20 x); B: Synovial tissue with papillary architecture replaced by mature adipocytes with infiltration of lymphocytes and plasma cells. (Hematoxylin/eosin, 200 x).