Correlative Study Of Different Humeral Head Cysts And Degree Of Rotator Cuff Injury

Objective: To retrospectively analyze the cystic changes in various parts of the humeral head in patients with rotator cuff injuries and to explore its relationship with rotator cuff injury.Methods: Magnetic resonance(MR)images of 102 patients who underwent a shoulder arthroscopy in our hospital from January to December in 2016 were collected.MR imaging was evaluated by the imaging physician.The patient was divided into four groups :anterior and posterior aspects of greater tuberosity,lesser tuberosity and bare bone of anatomical neck.And MRI grading of rotator cuff injury was performed.PASW Statistics 18.0.0 statistical software is used for statistical analysis.Independent-Samples T Test were used to compare the degree of damage of rotator cuffs between cystic and non-cystic change groups.One-Way ANOVA was used to test whether there was any difference in the cyst size of each group.Scatter charts of the relationship between cystic changes and the degree of rotator cuff injury in each group were drawn and Spearman rank correlation test was used to test whether the two were related.Results: Of the 102 patients,72(70.6%)had cystic changes in the humeral head,11(13.75%)were in the anterior aspects of greater tuberosity,41(51.25%)in the posterior region,and 20(25%)in the lesser tuberosity,8 cases(10%)were located in the bare bone of anatomical neck.The average degree of rotator cuff injury in the anterior cystic changes group and non-cystic group was statistically different(P=0.031),while the average degree of rotator cuff injury in the other three groups was not statistically different(P> 0.05).There was no significant difference in cyst size between groups(P =0.715),and was not related to the degree of rotator cuff injury(P> 0.05).Conclusions:Cystic changes in posterior aspects of greater tuberosity are the most common.Cystic changes in anterior aspects of greater tuberosity are with the most severe degree rotator cuff injury,that is,the site of cystic changes and rotator cuff injury are closely related.Humeral head cysts size are not related to the site or the degree of rotator cuff injury.