Quadrangular space syndrome:
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Quadrangular space syndrome:

Quadrangular space syndrome is characterized by compression or injury to the posterior humeral circumflex artery(PHCA), and the axillary nerve which is situated in the quadrangular space. So that may be the cervical radiculopathy, thoracic outlet syndrome, suprascapular nerve entrapment, and Parsonage-Turner syndrome. Quadrilateral space syndrome(QSS) is a rare condition in which neural and vascular structures…