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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.
Abstract:
Amiodarone, a prominent antiarrhythmic drug, may cause lung injury. We herein report the case of an 87-year-old man who had been taking amiodarone for 5 years and was subsequently referred due to respiratory failure. Chest computed tomography revealed multiple consolidations with air bronchograms in both lungs. Despite administering steroid pulse therapy, his respiratory failure worsened, and he died 3 days later. Autopsy revealed hyaline membrane formation and organic formation with fibrin deposition. Drug-induced lung injury caused by amiodarone was confirmed by autopsy. Caution is therefore required when fibrin deposition in the alveolar spaces is observed in such cases, which are prone to suffer a rapid deterioration.
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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