Term Name:	thymoma
Synonyms:
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. (M-8580/1).
Ontology:	MPATH [MPATH:351]