Abstract
Cancer affects all animals containing eukaryote cells. Less is known about the cancers that affect wild animals, since they move around and may not be easily observed for a long period of time. This review about cancers in wild animals contains useful data for the study of human cancers as well. Certain cancers in dinosaurs show that this metabolic disease is primitive and may have been around since the beginning of the multicellular organisms. This data also shows there has been some cancer types in naked mole rats and wild sharks as well. Nowadays, Tasmanian Devils are plagued by an infectious cancer known as Tasmanian devil facial tumor disease (DFTD). Since the emergence of the disease in 1996, the population has declined by more than 60 percent. This type of cancer has an allograft transmission. It seems earthworms contain an anti-cancer agent which could be of great interests in the treatment of cancer. In the discussion part of our review we have discussed how Peto’s Paradox theory of cancer is not true and we have mentioned many data of the cancer incidences in whales and
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