What is the most likely diagnosis in a 69-year-old with mixed anxiety‑depressive disorder presenting with a one‑week history of agitation and visual hallucinations?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: September 22, 2026 • View editorial policy

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.

Ask Question

Delirium

La patología más probable en este paciente de 69 años con trastorno mixto de ansiedad y depresión que presenta una semana de agitación y alucinaciones visuales es delirium.

Razonamiento diagnóstico

El cuadro clínico descrito cumple con los criterios cardinales del delirium 1:

  • Inicio agudo (una semana de evolución)
  • Alteración del estado mental (agitación)
  • Alteración perceptual (alucinaciones visuales)

Las alucinaciones visuales en pacientes geriátricos están significativamente asociadas con delirium o demencia 2. En un estudio de clínica psiquiátrica geriátrica, el 10% de pacientes presentaron alucinaciones visuales, y las causas más comunes fueron delirium y demencia 2.

Características clínicas del delirium

El delirium se caracteriza por 1:

  • Alteración del nivel de conciencia con reducción de la capacidad para enfocar, mantener o cambiar la atención
  • Cambios cognitivos (déficit de memoria, desorientación, alteraciones del lenguaje) o alteraciones perceptuales (alucinaciones, delusiones)
  • Fluctuación de síntomas a lo largo del día
  • Alteraciones del sueño y actividad psicomotora anormal

Advertencia importante: Las alucinaciones NO son necesarias para el diagnóstico de delirium, aunque cuando están presentes, especialmente las visuales, apoyan fuertemente el diagnóstico 1.

Subtipos de delirium

El delirium puede presentarse como 1, 3:

  • Hiperactivo: Con agitación, alucinaciones y delusiones (como en este caso)
  • Hipoactivo: Con confusión y sedación (frecuentemente no diagnosticado)
  • Mixto: Fluctuando entre ambos subtipos

Este paciente presenta un delirium hiperactivo dado su cuadro de agitación y alucinaciones visuales.

Diagnósticos diferenciales a considerar

Aunque el delirium es el diagnóstico más probable, deben considerarse:

  1. Demencia con cuerpos de Lewy: Puede presentar alucinaciones visuales prominentes 4, 5, pero típicamente tiene un curso más insidioso con síntomas parkinsonianos y fluctuaciones cognitivas más prolongadas

  2. Síndrome de Charles Bonnet: Causa alucinaciones visuales en ancianos con enfermedad oftalmológica 4, pero los pacientes típicamente tienen insight sobre sus alucinaciones y no presentan agitación

  3. Efectos adversos de medicamentos: Especialmente si el paciente está tomando trazodona u otros psicotrópicos 6

Evaluación inmediata necesaria

Buscar causas precipitantes del delirium:

  • Infecciones (urinarias, respiratorias)
  • Alteraciones metabólicas (hipoglucemia, alteraciones electrolíticas, insuficiencia renal/hepática)
  • Hipoxia o hipoperfusión cerebral 7
  • Medicamentos (anticolinérgicos, benzodiazepinas, opioides)
  • Abstinencia de alcohol o benzodiazepinas 1
  • Causas neurológicas (ACV, hematoma subdural)

El delirium es prevenible en hasta 40% de los casos y requiere identificación y tratamiento urgente de la causa subyacente 3.

References

4
Research

[Hallucinations].

Nihon rinsho. Japanese journal of clinical medicine, 2013

Related Questions

What is the most likely diagnosis for a 48‑year‑old male senior executive who for the past two weeks has developed paranoid delusions that he is being undermined at work, monitored via cameras and microphones, and that his thoughts are being read?
What medications, including dose and frequency, are appropriate for a 71-year-old male with persistent delusions, auditory hallucinations, and persecutory beliefs?
What is the appropriate inpatient psychiatric treatment plan, including medication regimen, for a 55‑year‑old man with major depressive disorder with psychotic features, recent persecutory delusions and auditory/visual hallucinations, a history of intermittent clonazepam, diazepam, and zolpidem use, and current medications rosuvastatin and apixaban?
For an 82‑year‑old woman presenting to the emergency department with new‑onset paranoid delusions and no memory loss, should a head CT or MRI be obtained even though none was performed in the ED?
For a patient with a 7‑month history of worsening delusions, auditory hallucinations, prominent negative symptoms, severe dishevelment, and inability to perform basic self‑care, who is brought in by a supportive relative and denies suicidal or homicidal ideation, is an emergency department evaluation still required?
Should EzPAP be used in patients with asthma who are stable on room air and have minimal or no symptoms?
What pharmacologic agents can be prescribed for a patient presenting with flatulence and abdominal distension without red‑flag symptoms?
In which clinical situations is the use of an Acapella (oscillatory positive‑expiratory pressure) device indicated?
What alternative formulation of simethicone can be used in an adult patient with flatulence and abdominal distension without red-flag symptoms?
For a 69-year-old female, what ankle-brachial index (ABI) threshold indicates it is safe to apply compression therapy for bilateral lower-leg edema?
In an elderly nursing home patient with chronic obstructive pulmonary disease who has chest X‑ray findings of bilateral perihilar opacities and patchy lower‑lobe opacities, what is the appropriate diagnostic work‑up and treatment plan?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.