In this Sept. 5, 2012 photo, Dr. Joseph Rosenblatt, chief of hematology-oncology at the University of Miami cancer center, checks on Peanut's treatment.
Peanut has a fraternal twin named Pumpkin, a rarity in the animal kingdom. They are the youngest of six orangutans at Jungle Island and a hit with park visitors. Both are highly intelligent and have been taught to use sign language and an iPad to communicate with their trainers, but they have distinct personalities. Peanut is welcoming and demanding, offering her doctor a twig in return for his water bottle. Pumpkin is quiet and her hair hangs low over her forehead. Pumpkin has not been diagnosed with the disease.