Most commonly affects athletes with repeated hip abduction (e.g. dancing, gymnastics, martial arts) 2.
This typically is a result of a rapid relocation of a portion of the iliopsoas tendon, transiently entrapped anterior and lateral to the portion of the iliacus muscle belly during flexion external rotation and abduction of the femur, onto the superior pubic ramus during returning into the neutral position or a bifid tendon moving around itself.
Dynamic ultrasound examination while doing a manoeuvre to reproduce the snap is often diagnostic 1.
Treatment and prognosis
This phenomenon is present in approximately 40% of the asymptomatic population, and by itself does not require investigation, although in repetitive this condition can result in iliopsoas tendinopathy 1,2.
Iliopsoas tendon release or fasciotomy have been used to alleviate pain in those who fail conservative treatment measures.
- 1. Deslandes M, Guillin R, Cardinal E et-al. The snapping iliopsoas tendon: new mechanisms using dynamic sonography. AJR Am J Roentgenol. 2008;190 (3): 576-81. doi:10.2214/AJR.07.2375 - Pubmed citation
- 2. Lungu E, Michaud J, Bureau NJ. US Assessment of Sports-related Hip Injuries. (2018) Radiographics : a review publication of the Radiological Society of North America, Inc. 38 (3): 867-889. doi:10.1148/rg.2018170104 - Pubmed