Massimo De Filippo MD, Presenter: Nothing to Disclose

Mario Silva, Abstract Co-Author: Nothing to Disclose

Kevin Maurice Johnson MD, Abstract Co-Author: Nothing to Disclose

Celeste Bertone, Abstract Co-Author: Nothing to Disclose

Maurizio Zompatori, Abstract Co-Author: Nothing to Disclose

Cristina Rossi, Abstract Co-Author: Nothing to Disclose

To determine the accuracy of CT curved Multiplanar Reformatting (MPR) in the quantification of glenoid bone loss in patients with monolateral recurrent shoulder dislocation using arthroscopic assessment as the gold standard.

Thirty-four patients (5 females, 29 males, age range 20–48 years) with monolateral recurrent shoulder dislocation underwent 64-detector-row CT scan. All examinations were interpreted by two experienced musculoskeletal radiologists. MPR technology was used to obtain curved oblique sagittal plane reconstructed images that were tangential to glenoid articular surface. The articular surface area was measured on curved oblique sagittal plane in the normal and pathologic shoulder. A ratio of pathologic to normal glenoid surface area was calculated to quantify glenoid bone loss. MPR CT findings were then compared with arthroscopic findings carried out within 28 days after the CT study.

Curved MPR CT and arthroscopy were in agreement in 12 of 12 of patients with bony Bankart (100%). Glenoid bone loss on curved MPR CT were correctly calculated in 30 of 32 patients (sensitivity=94%), including bony Bankart lesions, and the absence of glenoid bone loss noted in 2 of 2 patients (specificity 100%). Interobserver agreement of curved MPR CT was almost perfect (kappa = 0.96).

Curved MPR CT imaging is a non-invasive quantitative method that provides an accurate evaluation of glenoid bone loss, in patients with monolateral recurrent shoulder dislocation. This method is useful for pre-surgical evaluation and helps determine the optimal surgical approach (arthroscopic capsulo-labral complex reinsertion or Latarjet-Putti arthrotomy).

Curved MPR CT has an high accuracy to demonstrate and quantify the glenoid bone loss, in patients with monolateral recurrent shoulder dislocation.

De Filippo, M, Silva, M, Johnson, K, Bertone, C, Zompatori, M, Rossi, C, Accuracy of Multiplanar Reformatted CT Imaging in the Quantification of Glenoid Bone Loss Following Shoulder Dislocation.  Radiological Society of North America 2010 Scientific Assembly and Annual Meeting, November 28 - December 3, 2010 ,Chicago IL. http://archive.rsna.org/2010/9010871.html