title: Chordomas in Fischer 344 rats.
abstract: Tissue sections and records of 56 rats with chordoma, identified in the National Toxicology Program's (NTP) data base of approximately 115,000 rats, were examined to determine morphological characteristics, incidence, and aspects of biological behavior. Chordomas occurred in aged rats, originated predominantly in lumbosacral vertebrae, were highly malignant, occurred three times more often in male versus female rats, and commonly produced bilateral posterior paresis, paralysis, and/or distention of the colon and rectum.
authors.affiliation: Chemical Pathology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC.
authors.forename: S A
authors.initials: SA
authors.lastname: Stefanski
authors.forename: M R
authors.initials: MR
authors.lastname: Elwell
authors.forename: K
authors.initials: K
authors.lastname: Mitsumori
authors.forename: K
authors.initials: K
authors.lastname: Yoshitomi
authors.forename: K
authors.initials: K
authors.lastname: Dittrich
authors.forename: H D
authors.initials: HD
authors.lastname: Giles
mesh_terms: D000818:Animals; D002817:Chordoma / Q000473:pathology / Q000648:ultrastructure / Q000662:veterinary*; D005260:Female; D007150:Immunohistochemistry; D008159:Lumbar Vertebrae; D008297:Male; D008854:Microscopy, Electron; D051381:Rats; D011916:Rats, Inbred F344; D011919:Rats, Inbred Strains; D012376:Rodent Diseases / Q000473:pathology*; D012447:Sacrum; D012888:Skull Neoplasms / Q000473:pathology / Q000648:ultrastructure / Q000662:veterinary*; D013125:Spinal Neoplasms / Q000473:pathology / Q000648:ultrastructure / Q000662:veterinary*