• Michał Polguj, Marcin Sibiński, Andrzej Grzegorzewski, Piotr Grzelak, Ludomir Stefańczyk, and Mirosław Topol.
• Department of Angiology, Medical University of Łódź, Ulica Narutowicza 60, 90-136 Łódź, Poland.
• Biomed Res Int. 2014 Jan 1; 2014: 196896.

AbstractThe most important risk factor of suprascapular nerve entrapment is probably the shape of the suprascapular notch (SSN). The aim of the study was to perform a radiological study of the symmetry of SSN. Included in the study were 311 patients (137 women and 174 men) who underwent standard computed tomography investigation of the chest. A total of 622 computed tomography scans of scapulae were retrospectively analyzed to classify suprascapular notches into five types. Suprascapular notch was recognized as a symmetrical feature in 53.45% of the patients. Symmetry was more frequently seen in females (54.0% versus 52.9%), but not to any significant degree (P = 0.8413). Type III was the most commonly noted symmetrical feature (66.9%) and type II was less common (0.6%). Type III was the most symmetrical type of suprascapular notch, occurring significantly more often as a symmetrical feature in comparison with type I (P < 0.0001), type II (P = 0.00137), or type IV (P = 0.001). Our investigation did not show that the suprascapular notch is a symmetrical feature. However, symmetry was recognized more frequently in the case of type III SSN. No significant differences in symmetry were found with regard to sex.

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