- See: Trianglular Space
- Quadrilateral Space Syndrome:
- caused transient blockage of the posterior humeral circumflex artery (and axillary nerve);
- typically occurs when the arm lies in a position of abduction, extension, and external rotation;
- patients note shoulder pain and paresthesias down the arm, esp with overhead activity;
- MRI findings may include atropy of the teres minor muscle as seen on saggital oblique MRI views
Quadrilateral Space Syndrome: Diagnosis and Operative Decompression Technique.