Tatum A McArthur1, Michael J Pitt2, William P Garth3, Carl A Narducci4. 1. The University of Colorado, Department of Diagnostic Radiology, 12631 E 17th Avenue, Mail Stop 8200, AO1 Room 2419, Aurora, CO 80045. Electronic address: tatum.mcarthur@ucdenver.edu. 2. The University of Alabama at Birmingham, Department of Diagnostic Radiology, 619 19th Street South, JTN 304, Birmingham, AL 35249-6830. Electronic address: mpitt@uabmc.edu. 3. The University of Alabama at Birmingham, Department of Orthopaedic Surgery, Sports Medicine, 1600 7th Avenue South, Suite 402, Birmingham, AL 35233. Electronic address: wgarthjr@uabmc.edu. 4. The University of Alabama at Birmingham, Department of Diagnostic Radiology, 619 19th Street South, JTN 329, Birmingham, AL 35249-6830. Electronic address: cnarducci@uabmc.edu.
Abstract
PURPOSE: To evaluate for development of Pellegrini-Stieda (PS)-type ossification following injury to the posterior attachment of the medial patellofemoral ligament (MPFL). MATERIALS AND METHODS: This retrospective study evaluated 27 patients with acute knee injury with initial radiographs, magnetic resonance imaging within 1 week of injury, and follow-up radiographs assessing for development of PS. RESULTS: Of the 27 patients who developed PS ossification, 7 patients (25.9%) had isolated MPFL injury with the ossification slightly more proximal than the traditional PS. CONCLUSION: Isolated injury to the posterior MPFL also leads to PS ossification, which is slightly superior in location to the traditional PS.
PURPOSE: To evaluate for development of Pellegrini-Stieda (PS)-type ossification following injury to the posterior attachment of the medial patellofemoral ligament (MPFL). MATERIALS AND METHODS: This retrospective study evaluated 27 patients with acute knee injury with initial radiographs, magnetic resonance imaging within 1 week of injury, and follow-up radiographs assessing for development of PS. RESULTS: Of the 27 patients who developed PS ossification, 7 patients (25.9%) had isolated MPFL injury with the ossification slightly more proximal than the traditional PS. CONCLUSION: Isolated injury to the posterior MPFL also leads to PS ossification, which is slightly superior in location to the traditional PS.