title: Juxtaacetabular ganglion as a differential diagnosis in pulsating groin masses.
abstract: Ganglion cysts of the hip joint are uncommon synovial-lined fluid-filled juxtaarticular groin lesions. Whereas in the past the correct diagnosis was often made only at surgery there are now valuable imaging methods used for the diagnostic work-up. In experienced hands ultrasonography (US) combined with colour duplex Doppler ultrasonography (CDDS) as a real-time imaging technique easily performed at the patient's bedside is a valid alternative to more expensive or invasive investigations. We report on a patient who presented with a ganglion cyst and in whom first supported by conventional US an aneurysm of the femoral artery was suspected. The diagnosis of a juxtaarticular ganglion was subsequently correctly made at our institution by CDDS and magnetic resonance imaging, respectively, and the cyst was exstirpated successfully. The differential diagnosis of a pulsating groin mass as well as the most useful and specific imaging methods in the diagnostic work-up in this clinical setting are discussed.
authors.affiliation: Department of Surgery, Zurich University Hospital, Switzerland. paolo.cassina@chi.usz.ch
authors.forename: P C
authors.initials: PC
authors.lastname: Cassina
authors.forename: M
authors.initials: M
authors.lastname: Hauser
authors.forename: T
authors.initials: T
authors.lastname: Kossmann
authors.forename: U
authors.initials: U
authors.lastname: Brunner
mesh_terms: D000077:Acetabulum; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D013581:Synovial Cyst / Q000175:diagnosis*; D014463:Ultrasonography