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.
greater than the expected number of a malignant neoplasm derived form mesenchymal stem cells, osteoblasts or osteocytes, occurring in a specific population in a given time period; osteosarcoma is a highly invasive and destructive tumor rising in the skeleton with osteoid and immature woven bone