EATING DISORDERS: Edited by Hans W. Hoek and Anna Keski-RahkonenEating disorders and posttraumatic stress disorderRijkers, Cleoa,b; Schoorl, Maartjec,d; van Hoeken, Daphnea; Hoek, Hans W.a,b,e,fAuthor Information aParnassia Psychiatric Institute bPsyQ Haaglanden, Eating Disorders Center cPsyQ Haaglanden, Psychotrauma Center, The Hague dDepartment of Clinical Psychology, Leiden University, Leiden eDepartment of Psychiatry, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands fDepartment of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, USA Correspondence to Cleo Rijkers, MSc, PsyQ Haaglanden Eating Disorders Center, Lijnbaan 4, 2512 VA The Hague, The Netherlands. Tel: +31 883573935; e-mail: [email protected] Current Opinion in Psychiatry: November 2019 - Volume 32 - Issue 6 - p 510-517 doi: 10.1097/YCO.0000000000000545 Buy Metrics Abstract Purpose of review Childhood maltreatment is associated with all types of eating disorders. We provide a systematic review of the recent literature on comorbid posttraumatic stress disorder (PTSD) in patients with eating disorders, and focus on prevalence, relationship with symptom severity, operating mechanisms and treatment. Recent findings The prevalence of comorbid PTSD in patients with eating disorders ranges from 9 to 24%, with research suggesting that comorbid PTSD is associated with more severe eating disorder symptoms. Maladaptive emotional regulation strategies may mediate the relationship between PTSD and eating disorders. Two pilot studies provide preliminary evidence that concurrent cognitive behavior therapy (CBT) for PTSD and eating disorders may be beneficial and that repetitive transcranial magnetic stimulation (rTMS) could be helpful in the treatment of PTSD in some eating disorder patients. Summary PTSD is a common comorbidity in patients with eating disorders and impacts the severity of their eating disorder symptoms. However, there is little research into concurrent treatments for PTSD and eating disorders. Difficulties in emotional regulation may be a common mechanism in both disorders. Copyright © 2019 Wolters Kluwer Health, Inc. All rights reserved.