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A Case of Ectopic Cystic Thymoma  

Lee, Jae Hyung (Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine)
Kim, Il Ok (Department of Internal Medicine, College of Medicine, Hanyang University)
Lee, Hee Kyung (Department of Internal Medicine, College of Medicine, Hanyang University)
Min, Kyueng Whan (Department of Pathology, College of Medicine, Hanyang University)
Kim, Sang Heon (Department of Internal Medicine, College of Medicine, Hanyang University)
Kim, Tae Hyung (Department of Internal Medicine, College of Medicine, Hanyang University)
Sohn, Jang Won (Department of Internal Medicine, College of Medicine, Hanyang University)
Yoon, Ho Joo (Department of Internal Medicine, College of Medicine, Hanyang University)
Shin, Dong Ho (Department of Internal Medicine, College of Medicine, Hanyang University)
Park, Chan Kum (Department of Pathology, College of Medicine, Hanyang University)
Kang, Jung Ho (Department of Thoracic Surgery, College of Medicine, Hanyang University)
Park, Sung Soo (Department of Internal Medicine, College of Medicine, Hanyang University)
Publication Information
Tuberculosis and Respiratory Diseases / v.62, no.4, 2007 , pp. 331-335 More about this Journal
Abstract
A thymoma commonly occurs in the superior mediastinum or the upper part of the anterior mediastinum but can be located in other places in rare cases. Cystic degeneration in a thymoma is a relatively common but focal event. In rare cases, the process proceeds to the extent that most if not all of the lesion becomes cystic. We report a case of a patient with a paracardial cystic thymoma in the lower aspect of the anterior mediastinum. A 49-year-old woman was referred to our hospital because of a mass discovered incidentally on a chest X-ray. She showed no symptoms or signs. Contrast-enhanced chest CT scan revealed a $5{\times}5cm$ sized, well-marginated, right paracardial cystic mass with a curvilinear and oval enhancing solid portion. A Surgical resection was performed. The mass was discontinuous with normal thymic tissue. Microscopy revealed a type B1 thymoma with prominent foci of medullary differentiation according to the WHO classification. There was no capsular or local invasion. The postoperative course was uneventful and the patient was discharged in good health.
Keywords
Ectopic; Cystic; Thymoma;
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