Axial FSE image (A, TE/TR = 27ms/5150ms) in a 68 year-old man status post total knee arthroplasty demonstrates synovitis with intermediate signal intensity particulate debris (white arrowheads) consistent with polymeric wear. Coronal FSE image (B, TE/TR = 27ms/4017ms) demonstrates well circumscribed foci of osseous resorption (black arrowheads), consistent with osteolysis; while osteolysis associated with polymeric wear is classically isointense in signal, cystic osteolysis, as seen in this example, may also occur.