There is a possibility that doctors are unable to determine where the tumor first came from using the basic tests. The 90-year-old former president has maintained an active lifestyle after leaving the White House in 1981, including international travel, building homes with Habitat for Humanity, and teaching Sunday school at a Georgia Baptist church. Carter’s father, brother and two sisters died of pancreatic cancer, and his mother also died of cancer. The former President never smoked a cigarette, as he declared. Carter said he had no signs of the disease. He also said he will adapt his schedule to fit with the treatment plan doctors develop but for the moment the medical information is not complete and there is no yet decision how to treat him.