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Surgical Resection of a Rapidly Growing Giant Pericardial Cyst: A Case Report

Author(s): Masanori Yokoba | Chiaki Kusanagi | Naomi Kuroudu | Yukitoshi Satoh | Noriyuki Masuda | Masato Katagiri

Journal: International Journal of Clinical Medicine
ISSN 2158-284X

Volume: 03;
Issue: 06;
Start page: 554;
Date: 2012;
Original page

Keywords: Pericardial Cyst | Intracystic Hemorrhage | Video-Assisted Thoracic Surgery | Mediastinal Mass

We report here a case of a patient who underwent surgical resection of a giant pericardial cyst that was growing rapidly, causing anterior chest pain. An asymptomatic 56-year-old woman underwent a complete medical checkup in a health-care center. Her chest X-ray showed an unusually large bulge on the left cardiac border, and she was referred to our hospital. The chest X-ray taken 2 years ago in another hospital showed similar bulge on the same left cardiac border, but it was noticeably smaller. Chest CT revealed a 9.5 × 4.5 cm pericardial cyst within the anterolateral aspect of the left cardiac border. The CT number of the mass was approximately 15 - 20 HU. The mass also showed slight hyperintensity on T1-weighted MR images and hyperintensity on T2-weighted MR images. Four weeks later, she experienced anterior chest pain for the first time, and the chest X-ray and CT showed an increase in the size of the pericardial cyst. The CT number of the mass increased to approximately 30 - 40 HU. The cyst was successfully removed by video-assisted thoracic surgery. The pericardial cyst was diagnosed as benign according to the results of histopathology. We conclude that the rapid growth of the pericardial cyst was caused by intracystic hemorrhage that originated from vascularized connective tissue in the cyst wall.
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