The suprascapular canal is an anatomical passage between two openings found on the upper dorsal aspect of the shoulder.
It is found bilaterally running on superior-lateral aspect of the dorsal surface of the scapula underneath the supraspinatus muscle.
Its passage covered by the supraspinatus fascia and connects between its entrance formed by the suprascapular notch (enclosed by the suprascapular ligament) and its exit formed by spinoglenoid notch (enclosed by the spinoglenoid ligament).
The mechanisms varies and range from anatomical variations to pathological formations as well as from nerve compression to dynamics and traction injuries.
The most common causes potentially occur at the suprascapular canal entrance site due to suprascapular notch stenosis, and at its exit site due to synovial joint cystic formation (ganglion cyst) bulging through the spinoglenoid notch.