![]() ![]() “It certainly adds to what we know about the onset and diagnosis of cancer in different purebred dogs, which is certainly interesting-and, in the future, will be important to people like me, who are clinical veterinarians.”īased on these findings, as well as evidence regarding tumor size and progression from prior studies in humans and canines, the authors of the study recommend that all animals start cancer screening at age seven and that breeds with a lower median age of diagnosis get screened earlier. “I’m happy to see more larger-scale studies like this in veterinary medicine because it wasn’t very long ago that we really didn’t have this kind of research,” says Lisa Moses, a veterinarian and bioethicist at Harvard Medical School, who was not involved in this work. The results were published this week in PLOS ONE.Ĭredit: Jade Khatib Source: “Age at Cancer Diagnosis by Breed, Weight, Sex, and Cancer type in a Cohort of More Than 3,000 Dogs: Determining the Optimal Age to Initiate Cancer Screening in Canine Patients” by Jill M. Those on the other end of the spectrum included bichon frises, West Highland white terriers and American Staffordshire terriers, all of which had a median age of diagnosis of 10.5 years or more. Dog breeds with the youngest median age of cancer diagnosis (seven years or earlier) included mastiffs, Saint Bernards, Great Danes and bulldogs. The team also found that purebred dogs tended to be detected at younger median ages than mixed-breed ones (eight versus 9.5 years) and that larger size was associated with earlier diagnosis. And neutered and spayed dogs were spotted later than those that had not been fixed (8.9 versus 7.9 years in males and nine versus 7.3 years in females). Males were diagnosed at a younger median age than females (8.4 versus nine years). The researchers found that, overall, the dogs’ median age at cancer diagnosis was 8.8 years. Samples from the third cohort were collected in a prior study by PetDx, which was carried out at 41 different sites in several countries, including the U.S., Canada and Brazil. Two of those groups of samples came from academic sites within the U.S.: one from the University of California, Davis, and another from a consortium that included Colorado State University, the Ohio State University, the University of Wisconsin–Madison and others. To determine what factors were associated with age of cancer diagnosis, Flory and her team at PetDx evaluated previously collected data from 3,452 dogs in three separate groups. “We really wanted to develop something that was applicable to the population of dogs that we have here ,” she says. Some have been conducted in Europe, where the common breeds, as well as other factors such as neutering or spaying practices, differ from those in the U.S., says veterinary oncologist Andi Flory, co-founder and chief medical officer of PetDx, a California-based pet diagnostics company. ![]() Researchers have examined the age of cancer diagnosis in dogs in the past-but those studies have mostly looked at specific breeds or cancer types. A new analysis of thousands of dogs finds that traits such as size, breed and whether an animal has been fixed are associated with how soon our furry friends might get diagnosed with the disease. About one in four will develop cancer at some point during its lifetime-and that proportion rises to an estimate of nearly 50 percent after a dog passes its 10th birthday. ![]()
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