is thymoma cancer
A thymoma is an uncommon tumor or cancer of the thymus gland. The thymus is a gland located in the anterior mediastinum (the area between the lungs in the chest) that plays a critical role in the development of immune cells during childhood.hymoma facts. 1  A thymoma is a type of thymus gland malignancy or cancer. 2  Thymic tumors are uncommon. 3  The thymus gland is present in the front of the space between the lungs called the mediastinum.