Contagious cancer in dogs confirmed; origins traced to wolves centuries ago

See article by Murgia et al. in the August 11, 2006, issue of the journal Cell for details.A new study in the August 11, 2006 issue of the journal Cell provides evidence that a form of cancer afflicting dogs has spread from one individual to another by the transmission of the tumor cells themselves. The disease demonstrates how a cancer cell can become a successful parasite with a worldwide distribution, according to the researchers.