Thymoma

A thymoma is a tumor originating from the epithelial cells of the thymus that is considered a rare neoplasm. Thymomas are frequently associated with neuromuscular disorders such as myasthenia gravis; thymoma is found in 20% of patients with myasthenia gravis. Once diagnosed, thymomas may be removed surgically. In the rare case of a malignant tumor, radiation therapy may be used.