The labrum is a fibrocartilaginous structure found in various joints of the body, including the shoulder and hip. It acts as a cushion and stabilizer, deepening the socket of the joint to help keep the bones in place during movement. This structure is crucial for maintaining joint stability and function. In the shoulder, the labrum surrounds the glenoid cavity, while in the hip, it encircles the acetabulum. Injuries to the labrum can lead to pain, instability, and reduced range of motion, often requiring medical evaluation and treatment to restore joint function.