title: Snapping pes anserine syndrome.
abstract: The patient was a 25-year-old man who was serving in the military. He was referred to a physical therapist for a progressively worsening painful snapping sensation in the posteromedial left knee region. Prior magnetic resonance imaging for the left knee was interpreted as normal, except for a mild fluid signal about the left pes anserine bursa. The patient was diagnosed with snapping pes anserine syndrome. However, despite 6 weeks of physical therapist intervention, the patient did not improve. A dynamic real-time ultrasound examination was then ordered, which demonstrated that the pes anserine tendons changed position as the knee moved from flexion to extension, sliding across a heterogeneous rounded mass in the posteromedial knee.
authors.affiliation: Naval Special Warfare Group ONE, San Diego, CA.
authors.forename: Charles E
authors.initials: CE
authors.lastname: Rainey
authors.forename: Danielle A
authors.initials: DA
authors.lastname: Taysom
authors.forename: Michael D
authors.initials: MD
authors.lastname: Rosenthal
mesh_terms: D000328:Adult; D002061:Bursa, Synovial / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D002062:Bursitis / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D010146:Pain / Q000175:diagnosis / Q000209:etiology*; D013577:Syndrome; D013710:Tendons / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery; D014463:Ultrasonography