|Classification and external resources
Embryonal tumor is a mass of rapidly growing cells. It is believed that it begins in embryonic (fetal) tissue. Embryonal tumors may be benign or malignant, and include neuroblastomas and Wilms tumors. Also called embryoma. Embryomas have been defined as: "Adult neoplasms expressing one or more embryo-exclusive genes", in: "Embryoma Gene Networks", http://www.embryomas.net
Embryomas can appear in the lungs.
It is not a precise term, and it is not commonly used in modern medical literature. Embryomas have been defined as: "Adult neoplasms expressing one or more embryo-exclusive genes".
This article incorporates public domain material from the U.S. National Cancer Institute document "Dictionary of Cancer Terms".