- See:
Trianglular Space 
- Anatomy:
-
formed by:
- humerus
-
teres major
-
teres minor
-
long head of triceps
-
contents:
-
axillary nerve &
posterior humeral circumflex artery pass posteriorly
thru the quadrangular 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. Francel-TJ. Dellon-AL. Campbell-JN. Plast Reconstr Surg. 1991. 87. pp 911-916.
Quadrilateral space syndrome. BR Chaill and RE Palmar. J. Hand Surg. Vol 8. 1983. p 65-69.
Surgical Decompression of the Quadrilateral Space in Overhead Athletes
Quadrilateral Space Syndrome: Incidence of Imaging Findings in a Population Referred for MRI of the Shoulder
