title: Anatomic and CT scan assessment of Teres Minor: a new index of trophicity.
abstract: BACKGROUND
  The present study reports the development of a CT assessment protocol for Teres Minor (TM) trophicity.
  
  
  OBJECTIVE
  Quantitative reproductible Terres Minor assessment on CT estimates the influence of muscle trophicity on the clinical and radiological results of palliative treatment of irreparable rotator cuff tear.
  
  
  METHODS
  An anatomic study of 30 cadaveric shoulders confirmed a constant anatomic relation between Terres Minor and the inferior pole of the glenoid cavity. This landmark was used to develop a novel CT assessment of TM trophicity.
  
  
  RESULTS
  The CT assessment showed excellent inter- and intra-observer reproductibility. The protocol defines a trophicity index, T2/G (T2 being TM thickness on axial CT slice, and G the maximum glenoid cavity thickness on axial slice), enabling reproductible TM analysis on preoperative arthro-CT.
  
  
  CONCLUSIONS
  The study validated the CT protocol, allowing application in pre- and postoperative assessment of irreparable rotator cuff tear.
  
  
  METHODS
  Level IV. Retrospective study.
authors: Orthopedics Dept A, Roger Salengro Hospital, Lille Regional University Hospitals, Lille, France. arcadia.szymanski@gmail.com
authors: C
authors: C
authors: Szymanski
authors: O
authors: O
authors: Boniface
authors: X
authors: X
authors: Demondion
authors: J-Y
authors: JY
authors: Deladerrière
authors: T
authors: T
authors: Vervoort
authors: A
authors: A
authors: Cotten
authors: C
authors: C
authors: Maynou
mesh_terms: D000368:Aged; D001182:Arthroscopy / Q000379:methods*; D002102:Cadaver; D005260:Female; D006801:Humans; D008297:Male; D012372:ROC Curve; D015203:Reproducibility of Results; D017006:Rotator Cuff / Q000000981:diagnostic imaging / Q000473:pathology; D000070636:Rotator Cuff Injuries; D012421:Rupture; D014057:Tomography, X-Ray Computed / Q000379:methods*; D015599:Trauma Severity Indices