A 7-year-old girl presented with painful swelling of the right knee and a history of juvenile idiopathic arthritis (JIA). MRI revealed a large joint effusion with thick synovial enhancement (Fig. 1) containing multiple near-uniform-size punctate hypointense lesions on T2-W images consistent with rice bodies (Fig. 2). Significant hyperemia was seen within the articular cartilage (Fig. 2).