title: Ultrastructure of canine vasoformative tumors.
abstract: The transmission electron microscope was used to examine 20 spontaneous canine hemangiosarcomas or hemangiopericytomas in order to define their fine ultrastructural features, and to compare those features with descriptions of human counterpart neoplasms. From specimen to specimen the neoplasms examined showed considerable structural heterogeneity but, in composite, appeared similar to the prototype human tumors. These data suggest that the canine hemangiosarcoma and hemangiopericytoma might serve as comparative models for studies of the morphogenesis of vasoformative neoplasms.
authors.affiliation: Department of Surgery, School of Veterinary Medicine, University of California, Davis 95616.
authors.forename: B R
authors.initials: BR
authors.lastname: Madewell
authors.forename: S M
authors.initials: SM
authors.lastname: Griffey
authors.forename: R J
authors.initials: RJ
authors.lastname: Munn
mesh_terms: D000818:Animals; D002466:Cell Nucleolus / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure; D003593:Cytoplasm / Q000648:ultrastructure; D004283:Dog Diseases / Q000473:pathology*; D004285:Dogs; D004730:Endothelium, Vascular / Q000648:ultrastructure; D006393:Hemangiopericytoma / Q000648:ultrastructure / Q000662:veterinary*; D006394:Hemangiosarcoma / Q000648:ultrastructure / Q000662:veterinary*; D006801:Humans; D007365:Intercellular Junctions / Q000648:ultrastructure; D007382:Intermediate Filaments / Q000648:ultrastructure; D008854:Microscopy, Electron