1 A CONCOMITANT BONE FRACTURE DELAYS COGNITIVE RECOVERY FROM TRAUMATIC BRAIN INJURY Yujin Suto MD, PhD 1,2 , Katsuhiro Nagata MD 3 , Syed M. Ahmed MD 1,2 , Christina Jacovides MD 1,2 , Kevin D. Browne BA 2 , John Cognetti MSE 2 , Maura T. Weber MSE 2 , Victoria E. Johnson MBChB, PhD 2 , Ryan Leone 1 , Lewis J. Kaplan MD 1 , Douglas H. Smith MD 2 , Jose L. Pascual MD, PhD 1,2 1 Division of Traumatology, Surgical Clinical Care and Emergency Surgery, University of Pennsylvania Perelman School of Medicine, 51 N 39 th Street, Medical Office Building 1 st Floor Suite 120, room 108, Philadelphia, Pennsylvania. 19104 2 Department of Neurosurgery, Center for Brain Injury and Repair, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania. 19104 3 Department of Emergency and Critical Care Medicine, Tokyo Medical University Hachioji Medical Center, Tokyo, Japan Correspondence address. Jose L. Pascual, MD, PhD, FRCS(C), FACS, FCCM Division of Traumatology, Surgical Clinical Care and Emergency Surgery, University of Pennsylvania Perelman School of Medicine, 51 N 39 th Street, Medical Office Building 1 st Floor Suite 120, room 108, Philadelphia, PA 19104; Tel, +1-215-614-0316; E-mail address, jose.pascual@uphs.upenn.edu ACCEPTED Journal of Trauma and Acute Care Surgery, Publish Ahead of Print DOI: 10.1097/TA.0000000000001957 Copyright © 2018 Wolters Kluwer Health, Inc. All rights reserved.