This article starts off by saying how everyone is aware that cancer cells die with the host. However, scientists are now wondering if cancer cells could press on to another body, in other words, contagious cancer. Even though it is not a huge threat right now, they believe that it can be a "medical possibility." There were two known stories in which one, a 19 year old laboratory worker, pricked herself with a syringe filled with colon cancer cells and developed a tumor in her hand. The second story involved a surgeon who got cancer from his patient, when he accidentally cut himself during an operation. Although this is very uncommon in humans, "contagious cancer" has been found in three kinds of animals: dogs, tasmanian devils, and soft shell clams. Cancer spreads through dogs during sexual intercourse since their intercourse involves a long period of time for cancer cells to easily cross over. In tasmanian devils, cancer is spread through wounds, when they try to "tear each other's faces off."
All of this makes scientists ponder over the risk of such diseases happening to humans. Right now, it remains a curiosity, otherwise contagious cancer would be everywhere.
This article was very interesting because I had no idea cancer was contagious in any kind of animal. I'm glad I came upon such an article because now I know how there actually is a such thing as contagious cancer and how it spreads to dogs and tasmanian devils. It is also good how scientists are researching the possibility for such diseases to happen in humans.