The labrum is a specialised fibrocartilaginous structure that surrounds the edge of the acetabulum (socket). It has a key role in deepening the socket and enhancing stability, as well an important role in the nutrition and health of the hip. The labrum can be torn. This frequently happens in association with femoroacetabular impingement (FAI), but can occur in isolation. Treatment at arthroscopy with the labrum can either be debrided (removed) and smoothed off damaged tissue, or if the labrum is unstable this can be repaired back to the bone with special stitches that are inserted through the bone via special bone anchors. It is not uncommon that labral tears may not be seen on preoperative scans, including MRI scans, or the significant damage is under called.