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Anorexia nervosa

Evidencia revisada por última vez: 24 Jul 2026
Tema actualizado por última vez: 22 May 2025

Resumen

Definición

Anamnesis y examen

Principales factores de diagnóstico

  • significantly low body weight
  • fear of gaining weight or becoming fat, or behaviors that interfere with weight gain despite evidence of significantly low body weight
  • disturbed body image
  • calorie restriction
  • binge-eating and/or purging
  • misuse of laxatives, diuretics, or diet pills
  • amenorrhea
  • decreased subcutaneous fat
Todos los datos

Otros factores de diagnóstico

  • general fatigue, muscle weakness, and poor concentration
  • significant preoccupation with thoughts of food
  • orthostatic hypotension
  • nonspecific gastrointestinal symptoms
  • cardiac symptoms and signs
  • changes to hair, skin, and nails
  • dependent edema
  • osteopenia or osteoporosis
Todos los datos

Factores de riesgo

  • female sex
  • adolescence and puberty
  • obsessive and perfectionist traits
  • exposure to Western media
  • genetic influence
  • middle and upper socioeconomic classes
  • athlete
  • appearance-related teasing
  • childhood maltreatment
  • celiac disease
  • type 1 diabetes mellitus
Todos los datos

Pruebas diagnósticas

Primeras pruebas diagnósticas para solicitar

  • clinical diagnosis
  • CBC
  • serum chemistry
  • thyroid function tests
  • liver function tests
  • blood glucose
  • urinalysis
  • Sit Up-Stand-Squat (SUSS) test
Todos los datos

Pruebas diagnósticas que deben considerarse

  • Sick, Control, One, Fat, and Food (SCOFF) questionnaire
  • ECG
  • bone densitometry (dual-energy x-ray absorptiometry)
  • estradiol in females
  • testosterone in males
  • urine or serum pregnancy test
Todos los datos

Algoritmo de tratamiento

Agudo

medically stable and suitable for outpatient treatment

medically unstable or outpatient failure

Colaboradores

Autores

Evelyn Attia, MD

Professor of Psychiatry

Columbia University and Weill Cornell Medical College

New York

NY

Divulgaciones

EA receives royalties from UpToDate and Oxford University Press for authorship and has served as a clinical advisor to Equip Health, Inc.

B. Timothy Walsh, MD

Professor of Psychiatry

Columbia University

New York

NY

Divulgaciones

BTW has received royalties and honoraria for writing, editing, speaking, or consulting from Guilford Publications, McGraw-Hill, Oxford University Press, UpToDate, Wiley, the University of British Columbia, Silverhill Hospital, the University of Alabama, the American Society for Clinical Psychopharmacology, Health Advances, and Dell Medical School.

Agradecimientos

Professor Evelyn Attia and Professor B. Timothy Walsh would like to gratefully acknowledge Dr Pauline S. Powers and Dr Abby M. Irwin, previous contributors to this topic.

Divulgaciones

PSP and AMI declare that they have no competing interests.

Revisores por pares

Heather Thompson-Brenner, MD

Director

Eating Disorders Program Center for Anxiety and Related Disorders

Psychology Department

Boston University

Boston

MA

Divulgaciones

HTB declares that she has no competing interests.

Agradecimiento de los revisores por pares

Los temas de BMJ Best Practice se actualizan de forma continua de acuerdo con los desarrollos en la evidencia y en las guías. Los revisores por pares listados aquí han revisado el contenido al menos una vez durante la historia del tema.

Divulgaciones

Las afiliaciones y divulgaciones de los revisores por pares se refieren al momento de la revisión.

Referencias

Nuestros equipos internos de evidencia y editoriales colaboran con colaboradores expertos internacionales y revisores pares para garantizar que brindemos acceso a la información más clínicamente relevante posible.

Artículos principales

American Psychiatric Association. Diagnostic and statistical manual of mental disorders, 5th ed., text revision (DSM-5-TR). Washington, DC: American Psychiatric Publishing; 2022.

National Institute for Health and Care Excellence. Eating disorders: recognition and treatment. Dec 2020 [internet publication].Texto completo

American Psychiatric Association. Practice guideline for the treatment of patients with eating disorders. Feb 2023 [internet publication].Texto completo

Royal College of Psychiatrists. Medical emergencies in eating disorders (MEED): guidance on recognition and management. Oct 2023 [internet publication].Texto completo

Hornberger LL, Lane MA, Committee on Adolescence. Identification and management of eating disorders in children and adolescents. Pediatrics. 2021 Jan;147(1):e2020040279.Texto completo  Resumen

Artículos de referencia

Una lista completa de las fuentes a las que se hace referencia en este tema está disponible para los usuarios con acceso a todo BMJ Best Practice.
  • Anorexia nervosa images
  • Diferenciales

    • Bulimia nervosa
    • Avoidant-restrictive food intake disorder (ARFID)
    • Depression
    Más Diferenciales
  • Guías de práctica clínica

    • Determining treatment goal weights for children and adolescents with anorexia nervosa
    • World Federation of Societies of Biological Psychiatry (WFSBP) guidelines update 2023 on the pharmacological treatment of eating disorders
    Más Guías de práctica clínica
  • Folletos para el paciente

    Anorexia

    Anorexia: questions to ask your doctor

    Más Folletos para el paciente
  • Calculadoras

    Body Mass Index (BMI) percentiles for boys (2 to 20 years)

    Body Mass Index (BMI) percentiles for girls (2 to 20 years)

    Más Calculadoras
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