Dr. Kessler is professor of Medicine and Pathology and Section Chief of Hematology. He is also Director of the Coagulation Laboratory at Georgetown. A graduate of Tulane School of Medicine, Dr. Kessler received his specialty training in hematology and oncology at The Johns Hopkins Hospital. An international expert in the area of disorders of coagulation, Dr. Kessler has a particular interest in hemophilia. He also has expertise in the treatment of hematologic malignancies.