A papillary tumor is a type of cancerous growth that forms a finger-like projection on a surface. The term is most often used to describe tumors that occur in the thyroid gland, bladder, or breast. However, there are several other synonyms for papillary tumors that can be used to describe similar growths in different parts of the body. These include papilloma, villous tumor, verrucous carcinoma, exophytic tumor, and polypoid tumor. Regardless of the name, all papillary tumors share the characteristic of having a finger-like projection and can be difficult to diagnose and treat. It is important to seek medical attention if you suspect you may have a papillary tumor.