Popliteus tendon gout on MRI
Lateral knee pain initially responsive to colchicine
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Thickening of the popliteus tendon at its insertion with adjacent mildly T2 hyperintense material and related lateral knee subcutaneous edema and lateral femoral condyle edema centered on the popliteal groove. A deposit of T2 hyperintense material is seen at the deep aspect of the medial collateral ligament origin. The appearances are characteristic of peri-tendinous/peri-ligamentous gout. There is also an incomplete radial tear of the medial meniscal posterior horn and a tiny inner free edge radial tear of the lateral meniscal body.
Characteristic appearance of periarticular knee joint gout with deposition of urate and inflammation centered around the popliteus tendon.