Devil facial tumor disease (DFTD) is a unique form of transferable cancer that harms its victims by causing tumors to grow around the face. These tumors interfere with feeding patterns and lead to eventual starvation. The lack of genetic variation in Tasmanian devil populations leaves them particularly susceptible to mass infection. Thus, the disease has wiped out a large percentage of Tasmanian devils, wreaking havoc in the survival of this already endangered species.