Pes Anserine Bursitis - MSK Radiology Imaging Findings: • T2-hyperintense fluid-like signal along the medial aspect of the knee; below the level of the joint line. • The signal lies deep to the pes anserine tendons; Sartorius, Gracilis, Semitendinosus. Case description: • Well-defined fluid collection between the pes anserine tendons and the medial tibia. • Typically 2-cm below the joint line. • Other imaging findings may include bursal wall thickening, adjacent soft-tissue inflammation, and post-contrast enhancement. • BE SURE to exclude connection to meniscus and possible parameniscal cyst. Differential diagnosis for similar location of pain: • Popliteal Cyst (Baker Cyst): found superior and medial between medial gastrocnemius and semimembranosus. • Tenosynovitis of the pes anserine tendons: fluid WITHIN the tendon sheath not deep to them. • Parameniscal cyst: connection to meniscus. • Semimembranosus-Tibial Collateral Ligament bursitis: location, location, location. Dr. Donald von Borstel @DrvonBorstel #Pes #Anserine #PesAnserine #Bursitis #knee #clinical #mri #clinical #Radiology #diagnosis #msk
