PAN Weixing,Zhu Ni’na,YANG Xing’an, et al. A comparative study of MR manifestations between delaminated and non-delaminated tear in fullthickness rotator cuff tears[J]. JOURNAL OF WEZHOU MEDICAL UNIVERSITY, 2020, 50(12): 980-983, 989.
Abstract：Objective: To compare MR manifestations between delaminated rotator cuff tear and nondelaminated rotator cuff. Methods: Totally 243 cases with full-thickness rotator cuff tear were classified as group 1, group 2 and the control group based on the type of rotator cuff tear and the distance of retracted tendon.The tear length, the distance of retracted tendon, the degree of atrophy in musculus supraspinatus and musculus infraspinatus were recorded and compared by single factor ANOVA test or Kruscal-Wallis test according to the type of data distribution among three groups. Results: Delamination was present in 145 of 243 total tears (59.7%). There was statistical difference in the retraction distance of bursal layers between group 2 (22.2±9.8)mm and control group (29.7±12.0)mm, between group 2 (29.7±12.0)mm and group 1 (29.0±12.5)mm, respectively (P<0.01). There was statistical difference in the retraction distance of bursal layers between group 2 (35.1±11.7)mm and control group (29.7±12.0)mm, between group 2 (35.1±11.7)mm and group 1 (29.0±12.5)mm,respectively (P<0.01). There was no statistical difference in tear length and the degree of atrophy. Conclusion:The delaminated rotator cuff tear is more common than full-thickness rotator cuff tear. There is difference in the retraction distance between the articular side and the bursa side in different types. It is important to identify delaminated rotator cuff tear before operative repairs to make sure of the successful operation.
