INTRODUCTION:
The femoroacetabular impingement (FAI) is considered by many as one of the important hip diseases recently, although previously desiccated and didn't receive enough attention.
FAI syndrome is a motion-related clinical disorder of the hip with a triad of symptoms, clinical signs and imaging findings. It represents symptomatic premature contact between the proximal femur and the acetabulum. FAI syndrome has three different anatomical types. Cam-type FAI, pincer-type FAI and mixed-type FAI is caused by coexisting cam-type FAI and pincer-type FAI.
The tool of choice for studying FAI syndrome is MRI .Some cartilage anomalies may be too challenging for standard MRI spatial resolution and due to the labrum's oblique orientation, it might be challenging to identify some minor or nondisplaced tears on MRI so dynamic examination of the articular cartilage and labral lesion during arthroscopy with magnification and high resolution enables the surgeon to detect the location and extent of the chondral and labral lesions and to detect occult lesions easily missed by magnetic resonance imaging.