Missed our latest free live-stream? Catch up now with Intracranial Enhancement by Frank Gaillard

Quadrangular space syndrome

Case contributed by Dr Piyush P Siwach


Neck pain, left shoulder pain.

Patient Data

Age: 50 years
Gender: Female

Severe fatty atrophy of the teres minor muscle.

No mass or varices in the quadrangular space.

Unrelated to the other pathology, superior labral tear from 10 to 3 o'clock position and minor glenoid chondromalacia anteriorly and mild subacromial-subdeltoid bursitis.

Annotated image

Annotated images from the MRI highlighting the Teres minor muscle and quadrangular space.

Case Discussion

The pattern of atrophy of the teres minor muscle is consistent with chronic denervation. The tendon of teres minor is intact, and tears of this tendon are uncommon even in large rotator cuff tears. Quadrangular space is the site most likely to cause axillary nerve impingement resulting in this abnormality. A higher lesion is excluded as the deltoid muscle is normal in volume and signal intensity. In this case atrophy of the muscle is terminal and beyond the stage of surgical decompression of the space. 

PlayAdd to Share

Case information

rID: 53525
Published: 23rd May 2017
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.