Part of the reason dogs die from cancer is that they have lived long enough to develop the disease and did not die young from parvo, heartworm, or other risks. The disease manifests itself much as it does in humans, including lethargy, loss of appetite, pain, and limping. Dogs get the same kinds of cancer as humans. They share our environment and have similar DNA (we're all mammals, after all). Some breeds have a predilection to certain kinds of cancer; for example, osteosarcoma (bone cancer) affects primarily large breeds, and roughly 10% to 15% of rottweilers have the disease or will develop it. It also appears frequently in irish wolfhounds, boxers, mastiffs, and other large breeds. Non-hodgkin's lymphoma is common in boxers, rottweilers, cocker spaniels, border collies, labrador retrievers and mastiffs.Researchers who have mapped the canine genome are finding mutations on chromosomes of the afflicted animals. They are looking at where those mutations are located and at the corresponding locations on human chromosomes to learn more about these kinds of cancers. Some of the researchers on whom you can do a web search are:Kersten Linblad-TohElaine OstranderJaime ModianoMatthew BreenEric LanderWilliam Kisseberth
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