Kosawa said the warts began to appear after he got a cut on his skin as a teenager.
Dr. Anthony Gaspari, an American dermatologist, traveled to Indonesia to examine Kosawa.
Doctors believe Dede Kosawa's unusual appearance occurred because of a immune defect and HPV.
Dede, 35, with gnarled growths sprouting from his hands and feet, sits in front of his house in the village of Tanjung Jaya, West Java province, November 21, 2007. Dede hopes a doctor in the United States will be able to treat the horn-like extensions that started appearing on his body when he was a teenager and which earned him the "tree man" moniker. (INDONESIA)