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Epidemiological studies linked consumption of well-done meats with increased risk of certain cancers, including cancer of the colon or rectum. [14] A review of research articles on meat consumption and colon cancer estimated that red meat consumption contributed to 7 to 9% of colon cancer cases in European men and women. [citation needed]
In one study, 45% of the dogs that reached 10 years of age or older died of cancer. [1] Skin tumors are the most frequently diagnosed type of tumor in domestic animals for two reasons: 1. constant exposure of animal skin to the sun and external environment, 2. skin tumors are easy to see because they are on the outside of the animal. [2]
Hemangiosarcoma of the spleen or liver is the most common tumor to cause hemorrhage in the abdomen. [4] Hemorrhage secondary to splenic and hepatic tumors can also cause ventricular arrhythmias. Hemangiosarcoma of the skin usually appears as a small red or bluish-black lump. It can also occur under the skin.
The fat content of meat varies widely with the species and breed of animal, the way in which the animal was raised, what it was fed, the part of the body, and the methods of butchering and cooking. Wild animals such as deer are leaner than farm animals, leading those concerned about fat content to choose game such as venison .
Ionizing radiation may be used to treat other cancers, but this may, in some cases, induce a second form of cancer. [74] Radiation can cause cancer in most parts of the body, in all animals, and at any age, although radiation-induced solid tumors usually take 10–15 years, and can take up to 40 years, to become clinically manifest, and ...
While melanoma is known as the most aggressive skin cancer, [4] the mortality for PEM is lower than in other melanoma types. [5] Animal-type melanoma earned its name due to the resemblance of melanocytic tumors in grey horses. [3] All ages, including childhood, are susceptible to animal-type melanoma.
Carcinogenic parasites are parasitic organisms that depend on other organisms (called hosts) for their survival, and cause cancer in such hosts.Three species of flukes are medically-proven carcinogenic parasites, namely the urinary blood fluke (Schistosoma haematobium), the Southeast Asian liver fluke (Opisthorchis viverrini) and the Chinese liver fluke (Clonorchis sinensis).
Tobacco smoke causes increased exogenous DNA damage, and this DNA damage is the likely cause of lung cancer due to smoking. Among the more than 5,000 compounds in tobacco smoke, the genotoxic DNA-damaging agents that occur both at the highest concentrations, and which have the strongest mutagenic effects are acrolein , formaldehyde ...