title: Suprascapular Notch asymmetry: a study on 311 patients.
abstract: The 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.
authors.affiliation: Department of Angiology, Medical University of Łódź, Ulica Narutowicza 60, 90-136 Łódź, Poland.
authors.forename: Michał
authors.initials: M
authors.lastname: Polguj
authors.affiliation: Clinic of Orthopedic and Pediatric Orthopedics, Medical University of Łódź, Ulica Drewnowska 75, 91-002 Łódź, Poland.
authors.forename: Marcin
authors.initials: M
authors.lastname: Sibiński
authors.affiliation: Clinic of Orthopedic and Pediatric Orthopedics, Medical University of Łódź, Ulica Drewnowska 75, 91-002 Łódź, Poland.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Grzegorzewski
authors.affiliation: Department of Radiology, Medical University of Łódź, Ulica Kopcińskiego 22, 90-153 Łódź, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Grzelak
authors.affiliation: Department of Radiology, Medical University of Łódź, Ulica Kopcińskiego 22, 90-153 Łódź, Poland.
authors.forename: Ludomir
authors.initials: L
authors.lastname: Stefańczyk
authors.affiliation: Department of Normal and Clinical Anatomy, Medical University of Łódź, Ulica Narutowicza 60, 90-136 Łódź, Poland.
authors.forename: Mirosław
authors.initials: M
authors.lastname: Topol
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009408:Nerve Compression Syndromes / Q000000981:diagnostic imaging* / Q000473:pathology; D012540:Scapula / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed