Gout involving intra-articular popliteus tendon in the knee. Coronal fat saturated T2 MR image (a) demonstrates intermediate signal gout deposit in the popliteus tendon (Pop) adjacent to the popliteus groove (arrows), deep to the lateral collateral ligament (LCL). Note the hyperechogenicity of the gout deposit on ultrasound (b). F: femur; T: tibia.
