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Medical Term:


Pronunciation: thi-mo'ma

Definition: A neoplasm in the anterior mediastinum, originating from thymic tissue, usually benign, and frequently encapsulated; occasionally invasive, but metastases are rare; histologically, consists of any type of thymic epithelial cell as well as lymphocytes that are usually abundant. Malignant lymphoma that involves the thymus, Hodgkin disease, should not be regarded as thymoma.

[thymus + G. -oma, tumor]

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.