Important Announcements

Nondiscrimination Statement Update

Boston Medical Center Health System complies with applicable Federal civil rights laws and does not discriminate on the basis of age, race, color, national origin (including limited English proficiency and primary language), religion, culture, physical or mental disabilities, socioeconomic status, sex, sexual orientation and gender identity and/or expression. BMCHS provides free aids and services to people with disabilities and free language services to people whose primary language is not English.

To see our full nondiscrimination statement, click here.

Campus Construction Update

Starting September 14, we’re closing the Menino building lobby entrance. This, along with the ongoing Yawkey building entrance closure, will help us bring you an even better campus experience that matches the exceptional care you've come to expect. Please enter the Menino and Yawkey buildings through the Moakley building, and make sure to leave extra time to get to your appointment. Thank you for your patience. 

Click here to learn more about our campus redesign. 

Shoulder Anatomy

The labrum deepens the socket of the shoulder joint, making it a stronger fit for the head of the humerus.

The shoulder joint has three bones: the shoulder blade (scapula), the collarbone (clavicle), and the upper arm bone (humerus). The head of the upper arm bone (humeral head) rests in a shallow socket in the shoulder blade called the glenoid. The head of the upper arm bone is usually much larger than the socket, and a soft fibrous tissue rim called the labrum surrounds the socket to help stabilize the joint. The rim deepens the socket by up to 50% so that the head of the upper arm bone fits better. In addition, it serves as an attachment site for several ligaments.

What causes a shoulder to tear?

Injuries to the tissue rim surrounding the shoulder socket can occur from acute trauma or repetitive shoulder motion. Examples of traumatic injury include:

  • Falling on an outstretched arm
  • A direct blow to the shoulder
  • A sudden pull, such as when trying to lift a heavy object
  • A violent overhead reach, such as when trying to stop a fall or slide

Throwing athletes or weightlifters can experience glenoid labrum tears as a result of repetitive shoulder motion.

What are the symptoms of a torn shoulder?

The symptoms of a tear in the shoulder socket rim are very similar to those of other shoulder injuries. Symptoms include

  • A sense of instability in the shoulder
  • Shoulder dislocations
  • Pain, usually with overhead activities
  • Catching, locking, popping, or grinding
  • Occasional night pain or pain with daily activities
  • Decreased range of motion
  • Loss of strength

Departments and Programs Who Treat This Condition

department

Orthopedic Surgery

The Department of Orthopedic Surgery offers orthopedic services from head to toe for acute injuries, as well as chronic conditions of the musculoskeletal system, to help you get b…
department

Shoulder Surgery

Proper functioning of the shoulder (parts of the body that are also called the "upper extremities") – is necessary for daily activities. Writing, grabbing, driving, or lifting are…