Definitions for "Thymoma"
a potentially invasive tumor that must be removed
a thymic epithelial tumor in which the epithelial component exhibits no overt atypia and retains histologic features specific to the normal thymus
a tumor on the thymus gland, which regulates development of the immune system and is located in the chest above the heart
The Condition"...Doctors can usually tell by taking a tissue sample ( biopsy) and looking at it under a microscope..."