OBJECTIVE: Although @entity2850 is rare, the most common site of compression is the suprascapular notch. The anterior coracoscapular ligament (ACSL), which lies inferior to the @entity7109 ( @entity7109 ), may also be a cause of entrapment. We aimed to investigate the presence of ACSL and its relations to the suprascapular nerve and vessels. METHODS: We dissected 50 shoulders of 26 cadavers. We excluded 2 shoulders due to previous shoulder surgery. We observed the course of the suprascapular nerve, artery, and vein(s), and examined whether they passed between @entity7109 and ACSL or under ACSL. We classified the anatomical relations between @entity531 , @entity7109 , and ACSL. In Type I, the suprascapular nerve passed between @entity7109 and ACSL; in Type I  a, the suprascapular nerve and a single suprascapular vein passed between @entity7109 and ACSL; in Type I  b, a suprascapular vein passed under ACSL and the suprascapular nerve passed between @entity7109 and ACSL; in Type III, the suprascapular artery, vein, and nerve passed between @entity7109 and ACSL. RESULTS: ACSL was present in 16 shoulders (32%). The suprascapular nerve passed between @entity7109 and ACSL in all cases. We observed Type I, Type I  a, Type I  b, and Type III anatomical relations in 14%, 12%, 2%, and 4% of cases, respectively. CONCLUSION: Vascular structures that pass under @entity7109 may cause @entity2850 . Presence of ACSL with vessel(s) passing under it and/or between it and @entity7109 may increase the risk of nerve entrapment.

Anatomical relations between anterior coracoscapular ligament and suprascapular XXXX and a proposal for classification.

@entity7109 :: ('MESH:C566638', 'Disease') :: ['STSL', 'superior transverse scapular ligament'] @entity531 :: ('MESH:D013901', 'Disease') :: ['neurovascular structures'] @entity2850 :: ('MESH:D009408', 'Disease') :: ['suprascapular nerve entrapment']
@entity531 :: (MESH:D013901,Disease) :: ['neurovascular structures']
