Thymoma is a tumor originating from the epithelial cells of the thymus. Thymoma is an uncommon tumor, best known for its association with the neuromuscular disorder myasthenia gravis; thymoma is found in 15% of patients with myasthenia gravis. Once diagnosed, thymomas may be removed surgically. In the rare case of a malignant tumor, chemotherapy m...
<oncology, tumour> A tumour of thymic origin. ... (18 Nov 1997) ... 
(thi-mo´mә) a tumor derived from the epithelial or lymphoid elements of the thymus.
A tumour of thymic origin.
Type: Term Pronunciation: thī-mō′mă Definitions: 1. 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....
thymoma A tumor originating in the epithelial tissues of the thymus gland.
a tumour of the thymus gland