Dr. David Henry is Clinical Professor of Medicine, Pennsylvania Hospital. View profile. 1. In your view, which development that occurred in 2009 could have the most significant impact on oncology practice?From my perspective, the top story of 2009 is not a new advance per se. Rather, the key development is oncologists’ increased awareness that ambulatory patients with cancer who are treated with chemotherapy are at a markedly elevated risk of experiencing a venous thromboembolism (VTE). Regardless...