The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
higher than normal incidence of a fast growing and invasive tumor composed chiefly or entirely of immature undifferentiated cells that have embryonic characteristics resembling the primordium of the organ in which the tumor arose