Autopsy of Drug-induced Lung Injury with Atypical Diffuse Alveolar Disorder due to Amiodarone

Hikaru Mamizu1, Hiroki Kohda1, Yuusuke Tomita1

  • 1Department of Internal Medicine, Niigata Prefectural Central Hospital, Japan.

PubMed

Insights

Amiodarone, an antiarrhythmic drug, can cause severe lung injury. A case study highlights rapid respiratory failure and death in an elderly patient, emphasizing caution with this medication.

Area of Science:

  • Cardiology
  • Pulmonology
  • Toxicology

Background:

  • Amiodarone is a widely used antiarrhythmic medication.
  • Drug-induced lung injury (DILI) is a known but often underdiagnosed complication of amiodarone therapy.

Observation:

  • An 87-year-old male patient on amiodarone for 5 years presented with respiratory failure.
  • Chest CT showed bilateral lung consolidations with air bronchograms.
  • Despite aggressive steroid treatment, the patient's condition rapidly deteriorated.

Findings:

  • Autopsy confirmed amiodarone-induced lung injury.
  • Histopathology revealed hyaline membrane formation and fibrin deposition in alveolar spaces.
  • These findings indicate a severe and rapidly progressive form of DILI.

Implications:

  • Physicians should maintain a high index of suspicion for amiodarone-induced lung injury in patients presenting with respiratory distress.
  • The presence of fibrin deposition on autopsy may signify a poor prognosis and rapid clinical decline.
  • Careful patient monitoring and consideration of alternative treatments are crucial for patients on long-term amiodarone therapy.

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