title: The Transition From Thinness-Oriented to Muscularity-Oriented Disordered Eating in Adolescent Males: A Clinical Observation.
abstract: OBJECTIVE
  Robust empirical evidence has illustrated a rising prevalence of body dissatisfaction and disordered eating among males, noting that both may be oriented more toward muscularity-as opposed to thinness-oriented concerns. While an elevated prevalence of premorbid anorexia nervosa (AN) has been noted among those with muscle dysmorphia, little evidence has examined the process of this transition from thinness-oriented to muscularity-oriented disordered eating.
  
  
  METHODS
  This clinical observation presents a case of AN in an adolescent male, whose symptom presentation transitioned during the course of treatment for AN, into more muscularity-oriented disordered eating.
  
  
  RESULTS
  Despite the core body image disturbance and disordered eating behaviors being retained, the behavioral expression of muscularity-oriented disordered eating was difficult to detect during treatment for AN, and he was discharged from treatment as his muscularity-oriented disordered eating escalated.
  
  
  CONCLUSIONS
  Transdiagnostic crossover between thinness-oriented and muscularity-oriented disordered eating represents an important clinical concern, which may be challenging to measure and assess. Implications for treatment are discussed, and the early detection of muscularity-oriented disordered eating.
authors.affiliation: Department of Psychiatry, University of California, San Francisco, San Francisco, California. Electronic address: stuart.murray@ucsf.edu.
authors.forename: Stuart B
authors.initials: SB
authors.lastname: Murray
authors.affiliation: School of Psychology, University of Sydney, NSW, Australia.
authors.forename: Scott
authors.initials: S
authors.lastname: Griffiths
authors.affiliation: Centre for Emotional Health, Department of Psychology, Macquarie University, Sydney, NSW, Australia.
authors.forename: Deborah
authors.initials: D
authors.lastname: Mitchison
authors.affiliation: Centre for Emotional Health, Department of Psychology, Macquarie University, Sydney, NSW, Australia; Centre for Health Research, School of Medicine, Western Sydney University, Campbelltown, NSW, Australia.
authors.forename: Jonathan M
authors.initials: JM
authors.lastname: Mond
mesh_terms: D000293:Adolescent; D001823:Body Composition; D001828:Body Image / Q000523:psychology*; D001068:Feeding and Eating Disorders / Q000523:psychology*; D006801:Humans; D008297:Male; D053580:Muscle Strength; D018482:Muscle, Skeletal; D010549:Personal Satisfaction; D000067029:Physical Appearance, Body; D011795:Surveys and Questionnaires; D013851:Thinness / Q000523:psychology*
keywords: Anorexia nervosa; Male eating disorders; Muscle dysmorphia; Muscularity-oriented disordered eating