NCI Definition: A low-grade extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue that affects the thymus. It is characterized by the presence of centrocyte-like or monocytoid lymphocytes that surround reactive lymphoid follicles. There is infiltration of the thymic epithelium by lymphocytes and formation of lymphoepithelial lesions. It is associated with the presence of autoimmune disease, most frequently Sjogren syndrome. Patients are usually asymptomatic and the tumor is detected incidentally as a mediastinal mass on chest x-ray. A minority of patients present with dyspnea, hemoptysis, and chest pain. The prognosis is excellent. [1]

Disease Details

Thymic Extranodal Marginal Zone Lymphoma of Mucosa-Associated Lymphoid Tissue
Thymic Lymphoma


1. National Cancer Institute. NCI Thesaurus Version 18.11d. https://ncit.nci.nih.gov/ncitbrowser/ [2018-08-28]. [2018-09-21].

2. The AACR Project GENIE Consortium. AACR Project GENIE: powering precision medicine through an international consortium. Cancer Discovery. 2017;7(8):818-831. Dataset Version 8. This dataset does not represent the totality of the genetic landscape; see paper for more information.

3. All assertions and clinical trial landscape data are curated from primary sources. You can read more about the curation process here.