Your doctor may suggest the following tests to get a clearer picture of what is happening inside your shoulder. Tests may include:

• X-rays. These images can show fractures, arthritis, dislocation or other bone problems in the shoulder.
• Arthrocentesis (aspiration). In this procedure a needle is inserted into a joint to remove fluid. Arthrocentesis is used for diagnosis as well as for treatment of some shoulder problems.
• Injections. Lidocaine may be injected into a bursa (def.)Bursae Bursae (singular = bursa) are filmy, sac-like structures that allow bones, muscles and tendons to glide smoothly over each other. In the shoulder, the bursae are located between the rotator cuff tendons and the shoulder blade (acromion). They help cushion the rotator cuff from the boney front edge of the shoulder blade. or shoulder joint. If symptoms are relieved, this will help confirm a diagnosis.
• Electromyogram (EMG). This test uses a device called an electromyograph to record electrical activity and evaluate function in muscles or nerves.
• Computer tomography scan (CT scan). The CT scan involves use of special x-ray equipment to obtain image data from different body angles. The data then are processed to show a cross-section of body tissues and organs. A CT scan can help visualize bone problems in the shoulder.
• Magnetic resonance imaging (MRI). Strong magnetic fields and radio waves are used to create a cross-sectional image of the affected shoulder area. An MRI may be used to visualize soft tissue injuries such as torn rotator cuff or tendonitis.
  
  • MR Arthrogram. A medical dye is injected into the shoulder and an x-ray is taken of the area. This test is used in conjunction with an MRI to help identify shoulder problems such as a torn rotator cuff or labral tear (def.)Labrum The labrum is a thick fibrous rim of tissue surrounding the glenoid or "socket" portion of the shoulder. It deepens the socket to provide more stability for the humeral head or "ball.".
• Arthroscopy. This minimally invasive surgical procedure is used to examine the shoulder as well as to treat shoulder problems.