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Updated: Feb 10, 2026

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Published on: May 10, 2022
Pericardial Cyst: Cause of Sudden Cardiac Death?
Marie Brix Ley1, Maiken Kudahl Larsen1
1Department of Forensic Medicine, Aarhus University, Palle Juul-Jensens Blvd. 99, 8200, Aarhus, Denmark.
Insights
Sudden cardiac death is a global health crisis. This case highlights a rare posterior mediastinal pericardial cyst as a potential, though unusual, cause of sudden death, even in asymptomatic individuals.
Area of Science:
- Cardiology
- Pathology
- Forensic Medicine
Background:
- Cardiovascular disease is the primary cause of global sudden death.
- Sudden cardiac death etiology encompasses diverse conditions, with pericardial cysts rarely implicated.
- Pericardial cysts are typically benign, asymptomatic mediastinal masses.
Observation:
- A 63-year-old woman presented with dyspnea and hoarseness.
- The patient experienced sudden death during a computed tomography (CT) scan attempt.
- A post-mortem examination was conducted for forensic and histologic analysis.
Findings:
- Forensic and histologic examination identified a pericardial cyst in the posterior mediastinum.
- Toxicology and biochemistry tests, including tryptase levels, were negative for other causes of death.
- No competing causes for the sudden death were identified.
Implications:
- This case underscores the importance of considering rare pathologies, such as posterior mediastinal pericardial cysts, in the differential diagnosis of sudden cardiac death.
- Even asymptomatic pericardial cysts may pose a risk in specific circumstances.
- Further investigation into the potential mechanisms linking pericardial cysts to sudden death may be warranted.
Abstract:
Cardiovascular disease is the leading cause of sudden death in the world. The etiology of sudden cardiac death involves a wide range of diseases, but seldom pericardial cysts. A pericardial cyst is an uncommon cyst usually located in the middle mediastinum and rarely in the posterior part. They are usually harmless and asymptomatic. Here, we present a case of a 63-year-old woman who presented with dyspnea and hoarseness, but died suddenly after a CT scan was attempted. The detailed forensic pathologic and histologic examination revealed a pericardial cyst located in the posterior mediastinum. Toxicology and biochemistry tests, including tryptase, found no competing cause of death.
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