A Giant Thymic Cyst Accompanied by Acute Mediastinitis

Akihiro Miura, Kazuhiko Shien, Tomohiro Toji, Shinji Otani, Hiromasa Yamamoto, Mikio Okazaki, Seiichiro Sugimoto, Junichi Sou, Masaomi Yamane, Shinichi Toyooka

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)431-433
Number of pages3
JournalActa medica Okayama
Issue number5
Publication statusPublished - 2020


  • mediastinitis
  • multilocular thymic cyst
  • thymic cyst

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)


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