The thymus, a small organ that lies in the upper chest under the breastbone, is part of the lymph system. It makes white blood cells, called lymphocytes, that protect the body against infections.
There are different types of tumors of the thymus. Thymomas and<unk> s are rare tumors of the cells that are on the outside surface of the thymus. The tumor cells in a thymoma look similar to the normal cells of the thymus, grow slowly, and rarely spread beyond the thymus. On the other hand, the tumor cells in a<unk>  look very different from the normal cells of the thymus, grow more quickly, and have usually spread to other parts of the body when the cancer is found.<unk>  is more difficult to treat than thymoma.
Thymic carcinoma
Nodal marginal zone lymphoma
Silent thyroiditis
Follicular lymphoma
B-cell lymphoma
Primary thyroid lymphoma
Anaplastic thyroid cancer
T-cell lymphoma