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.
any structural anomaly of the most posterior paranasal sinus located in the sphenoid bone near the optic nerve and the pituitary gland on the side of the skull; it drains into the sphenoethmoidal recess superior to the superior concha; the sinus is divided into right and left parts by a bony septum