Rotator cuff injury is a common cause of shoulder pain and dysfunction. Finding out patients with suspected rotator cuff injuries through physical examination of the shoulder joints, MRI further assists in the diagnosis, and final surgical diagnosis and treatment are the current standardized procedures.

How to apply multiple physical examination programs to make judgments sensitively, efficiently and accurately is a clinical problem that needs to be solved urgently.

Rotator cuff injury is a common cause of shoulder pain and dysfunction. The common symptoms of rotator cuff injury include shoulder pain, weakness, and limited mobility. Arthroscopic exploration is the gold standard for the diagnosis of rotator cuff injury, but it is an invasive examination that is difficult to carry out routinely; MRI is sensitive in diagnosing rotator cuff tears Both sex and specificity are high, but due to the popularity, cost and waiting time, it is difficult to be used as a routine screening method.

Therefore, finding patients with suspected rotator cuff injuries through physical examination of the shoulder joints, MRI further assisting in the diagnosis, and final surgical diagnosis and treatment are the current standardized procedures.

However, although there are many physical examination methods for the shoulder joint, the accuracy of each method is different, and each has its own sensitivity and specificity. How to apply multiple examination programs in combination to make it sensitive, efficient and accurate Judgment is a problem that needs to be solved clinically.

This study is expected to adopt prospective research methods to collect and collect patient medical records, preoperative physical examination results, imaging data, and findings during intraoperative exploration, to understand the impact of various shoulder joint physical examination methods and imaging data on rotator cuff injuries

Inclusion Criteria:

• Patients who are prepared to undergo arthroscopic surgery for shoulder injuries

Exclusion Criteria:

• Shoulder stiffness, shoulder instability, calcified tendinitis, past surgery, side-to-shoulder disease, hamada osteoarthritis, frozen shoulder, acute joint injury, rheumatoid arthritis, hyperuricemia

Patients with shoulder pain who were treated at peking university's Third Hospital outpatient clinic for a continuous period of time