He completed plastic surgery fellowships at Children's Hospital in Boston, Massachusetts, University of Miami, and in Paris, France.
[1][2] McKinnon was subsequently featured on the Oprah Winfrey Show for successfully removing the world’s biggest solid tumor.
[4][5][6] From 1985-2014 he led missions to Choluteca, Honduras where he performed cleft lip and palate and other reconstructive surgery.
[7] In 2011, on request of US 501(c) Tree of Life International, Sam-Ottawa of Canada-based Virtual Medical Miracle Network (VM2N) connected McKinnon to Nguyen Duy Hai of Dalat Lam Dong, Vietnam, who suffered from a non-cancerous tumor weighing 198-pound (90 kg), which was growing on the right side of his abdomen.
In the program, he successfully removed large facial tumors from two patients, one in Ohio and the other in Thailand, who suffer from neurofibromatosis.