Dr. Thornton attended medical school at the University of Washington in Seattle, WA. He was Co-Chief Resident in Surgical Pathology at the University of Washington, and completed residencies in Anatomic Pathology and Clinical Pathology, as well as a fellowship in Surgical Pathology, at the same institute. Dr. Thornton is board certified in Anatomic Pathology and Clinical Pathology. He holds additional sub-specialty expertise in Breast Pathology, Cytopathology, and Fine Needle Aspiration (FNA).Dr. Thornton joined CellNetix in 2004 after ten years with the Providence Medical Center pathology staff in Seattle, where Dr. Thornton developed his special interest in Breast Pathology. He serves on the CellNetix Standards Committee and is an active member of the IT Committee. Additionally, Dr. Thornton performs Fine Needle Aspirations(FNAs) and especially enjoys teaching residents and medical students at the University of Washington. He is named in the Seattle Met magazine’s Top Doctors 2011 issue.