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Hip abductors are a major group of muscles found in the buttocks. It includes the gluteus maximus, gluteus medius, gluteus minimus, and tensor fascia lata muscles.
The Gluteus medius arises at the top of the pelvic bone and runs to attach on the outer side of the thighbone or femur. The muscle controls side-to-side movement of the hip and stabilizes hip movement.
Gluteus medius tear is a condition characterized by severe strain of the gluteus medius muscle that results in partial or complete rupture of the muscle. It is also referred to as rotator cuff tear of the hip.
The tear or rupture of the gluteus medius muscle is commonly seen in runners and athletes involved in high-impact sports such as soccer or basketball due to sudden bursts of activity or poor flexibility of the gluteus muscle. Any traumatic or overuse injury, or degenerative changes may lead to partial or complete tear of the gluteus muscle.
The symptoms include pain and tenderness over the lateral aspect of the hip which may aggravate with activities such as running, climbing stairs, prolonged sitting or walking, and lying on the affected side of the hip. One of the main symptoms of gluteus medius tear is the presence of Trendelenburg sign - dropping of the pelvis towards the unaffected side by being unable to bear weight on the affected limb.
The diagnosis of gluteus medius tear is based on physical examination of the patient, followed by palpation of the affected muscle, testing muscle power and assessing walking pattern or gait of the patient. Certain special tests such as single-leg squat test or a positive Trendelenburg sign confirm the diagnosis of gluteus medius tear. Sometimes, MRI or ultrasound may be helpful to show the pathological changes of the muscle.
The aim of treatment is to restore the normal function of the gluteus medius tendon.
Untreated cases of gluteus medius tear may result in gait disturbance and disability.