Acetabular glenoid labral injury is one of the common causes of hip pain and eventually osteoarthritis of the hip joint, which has long been underappreciated due to insufficient knowledge of the disease. In the last decade, with the advancement of clinical diagnostic techniques, surgical techniques and improvement of arthroscopic instruments, glenoid labral injury and femoral acetabular impingement have gradually attracted attention and their diagnosis and treatment levels have been improving. Under the premise of strict mastery of surgical indications, arthroscopic treatment of glenoid labral injuries is a minimally invasive and reliable treatment method. Since November 2008, our department has started the treatment of acetabular glenoid labral injury and femoral acetabular impingement, using magnetic resonance arthrography to improve the diagnostic accuracy of acetabular glenoid labral injury, and performing arthroscopic glenoid labral debridement, glenoid labral repair and femoral head neck shaping, and has completed the treatment of nearly 30 cases of arthroscopic acetabular glenoid labral injury by June 2010. A retrospective summary of some cases with unilateral lesions and a long follow-up period is presented as follows: General characteristics of the cases: no significant gender bias; age 17-65 years, average 37.1 years. Causes of injury: 1 case of fall from height injury (without fracture dislocation), most of them had a history of hip sprain, and about 1/4~1/3 had no clear history of trauma. Pain around the hip joint was present in all cases, most commonly in the inguinal region, and in some cases with hip pain. More than half had varying degrees of hip colic symptoms, and a few had medial knee radiating pain. The time from symptom onset to diagnosis ranged from 3 to 54 months, with an average of 12.4 months. The clinical examination revealed that: the mobility of the affected hip joint was limited to varying degrees in all directions, with statistically significant differences in flexion and internal rotation compared with the healthy side; the positive rate of impingement test was 100%; the positive rate of McCarthy test was 43%. Imaging findings: (a) Radiographs: All patients had no significant joint space narrowing and no signs of acetabular dysplasia. 52% showed cam-type impingement with a mean alpha angle of 65.7% (58%-75%) (Figure 1), of which 29% also had pincer-type impingement and 9% had simple acetabular retroversion (Figure 2, crossed sign). 38% had no bony morphological abnormalities. (b) Magnetic resonance arthrography: contrast infiltration in the anterior upper quadrant acetabulum and glenoid labial migration was seen in all patients, with a 100% positive rate (Figure 3). Treatment: Epidural or general anesthesia was used. If the torn glenoid labrum was severely degenerated or the severed end was free (Figure 4), a cleanup operation was performed to remove the torn labrum and grind the hyperplastic bone at the acetabular rim; if the damaged labrum was eligible for suturing, a glenoid repair was performed with suture fixation using a wire anchor nail; if there was head and neck impingement, a femoral head and neck plasty was performed to grind the excess bone and restore the normal shape of the head and neck area. Partial weight-bearing ambulation with crutches was performed 1 week after surgery. Those who underwent simple cleanup were fully weight-bearing within 4 weeks after surgery, while those who underwent head and neck region plication delayed full weight-bearing for 2 weeks. Normal activities and sports were gradually resumed 3-4 months after surgery. Treatment results: The follow-up period after surgery ranged from 6 to 19 months, with a mean of 11.6 months. At the end of the follow-up period, 52% of the patients’ pain disappeared and 48% had significant relief; the symptoms of joint locking completely disappeared; the VAS pain score decreased from (5.3±1.3) before surgery to (1.4±0.9) 6 months after surgery; the Harris hip function score improved from (63±9) before surgery to (84±10) 6 months after surgery. There was no important vascular or nerve injury, no infection or fracture, no perineal injury, no lower limb phlebitis or deep vein thrombosis. One case of lateral femoral cutaneous nerve injury occurred, manifested as postoperative numbness of the lateral thigh skin, which recovered on its own after 3 months.