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Background: Femoral Acetabular Impingement (FAI) is a known cause of hip pain in adolescents and young adults produced by altered hip joint mechanics. Types of FAI include Cam deformity, Pincer deformity or a combination. Abnormal abutment of the femoral head on the acetabular rim, especially during hip flexion and internal rotation (IR) causes a sharp, pinching pain in the groin and lateral hip. Chronic FAI can lead to hip osteoarthritis (OA) and labral and/or chondral defects. It is unknown if there is a correlation between FAI and sacralization.
Palmer, Brianna, "Outpatient Interventions For Femoral Acetabular Impingement Complicated By Hip Osteoarthritis, Labral Tear And L5 Sacralization: A Case Report" (2014). Case Report Posters. Poster 19.