Atif A. Ahmed is Professor of Pathology and Director of the Anatomic Pathology Division at Children's Mercy Hospitals, Kansas City, Mo, USA. Dr. Ahmed is a board-certified pathologist, graduated from Medical School in 1988 and completed pathology residency and fellowship training in prominent insititutions in the U.S.A. Dr. Ahmed published more than 90 publications inclduing peer-reviewed articles, book chapters and meeting abstracts. He is the book editor of "Gastrointestinal Stromal Tumors in Adults and Children". He is a Member of the Society for Pediatric Pathology, the Children's Oncology Group, and the American Association for Cancer Research; a Life Fellow of the College of American Pathologists; and an overseas fellow of the Royal Society of Medicine. He serves on the editorial board of several journals.