title: Clinical Relevance of Classifying Massive Rotator Cuff Tears: Results Based on Functional and Radiological Findings After Arthroscopic Repair.
abstract: Studies on the results of arthroscopic repair of massive rotator cuff tears have reported widely varied prognoses. Among other factors, the sizable discrepancy can be attributable to the fact that the current definition of massive rotator cuff tears covers an extensive area of tendons.
  
  
  
  Functional and radiological results according to subgroups would show significant inter-subgroup differences preoperatively and postoperatively.
  
  
  
  Cohort study; Level of evidence, 2.
  
  
  
  A total of 104 patients who required arthroscopic repair for massive rotator cuff tears were prospectively evaluated. The patients were allocated into 3 groups according to tendon involvement as diagnosed by preoperative magnetic resonance imaging: group 1 (anterosuperior type involving the subscapularis and supraspinatus), group 2 (posterosuperior type involving the infraspinatus and supraspinatus), and group 3 (anteroposterior type involving the subscapularis, supraspinatus, and infraspinatus). We compared functional results (at 2 years postoperatively) and radiological findings (at 1 year postoperatively) for each group.
  
  
  
  There were 34 patients in group 1, 54 in group 2, and 16 in group 3. In all 3 groups, functional results significantly improved after surgery. There were no statistically significant intergroup differences in functional results among the 3 groups. On the radiological evaluations, each group (groups 1, 2, and 3) showed a significantly different result in the preoperative acromiohumeral distance (AHD) (7.19, 5.44, and 5.22 mm, respectively), tear size (38.8, 39.3, and 46.4 mm, respectively), extent of retraction (33.9, 40.0, and 41.4 mm, respectively), postoperative AHD (8.92, 7.37, and 6.71 mm, respectively), and retear rate (23.5%, 51.9%, and 56.2%, respectively) ( P < .001 for all).
  
  
  
  Massive rotator cuff tears can be divided into 3 types: anterosuperior (group 1), posterosuperior (group 2), and anteroposterior (group 3). Each group has distinctive characteristics and shows different results in the preoperative AHD, tear size, extent of retraction, postoperative AHD, and retear rate, which provide a reasonable basis for categorization. So far, massive rotator cuff tears have only been broadly defined, consequently being understood as a single category by many. However, to clearly understand and evaluate this injury, we suggest identifying differences within the category through proper subclassification.
authors.affiliation: Department of Orthopaedic Surgery, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
authors.forename: Hyun Soo
authors.initials: HS
authors.lastname: Ok
authors.affiliation: Department of Orthopaedic Surgery, CHA Gumi Medical Center, CHA University, Gumi, Korea.
authors.forename: Byung Guk
authors.initials: BG
authors.lastname: Kim
authors.affiliation: Department of Orthopaedic Surgery, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
authors.forename: Won Chul
authors.initials: WC
authors.lastname: Choi
authors.affiliation: Department of Orthopaedic Surgery, CHA Gumi Medical Center, CHA University, Gumi, Korea.
authors.forename: Chul Gie
authors.initials: CG
authors.lastname: Hong
authors.affiliation: Department of Orthopaedic Surgery, CHA Gumi Medical Center, CHA University, Gumi, Korea.
authors.forename: Jee Woong
authors.initials: JW
authors.lastname: Kim
authors.affiliation: Department of Orthopaedic Surgery, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
authors.forename: Jae Hwa
authors.initials: JH
authors.lastname: Kim
mesh_terms: D000368:Aged; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011859:Radiography; D000070636:Rotator Cuff Injuries / Q000145:classification* / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology
keywords: arthroscopic repair; massive rotator cuff tears; subgroup