A Giant Thymic Cyst Accompanied by Acute Mediastinitis
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Updated: Dec 3, 2025

Minimal Invasive Resection of Large Retrosternal Thyroid Goiter
Published on: September 20, 2024
Akihiro Miura1, Kazuhiko Shien1, Tomohiro Toji2
1Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Hospital, Okayama 700-8558, Japan.
Abstract:
We encountered a rare case of thymic cyst accompanied by mediastinitis. A 39-year-old Japanese male presented with fever and chest pain. The chest CT revealed a mass composed of a lobular cystic lesion with inflammation, suggesting the onset of mediastinitis. A definitive histological diagnosis was not obtained, and we performed a thymectomy. Pathologically, the thymic cyst was accompanied by multiple cavities, mimicking thymic cysts, caused by the inflammatory abscess. The surrounding adipose tissue showed inflammatory cell infiltrations with chronic fibrosis. These findings indicate that clinicians should be aware that thymic cysts may cause severe mediastinitis.
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