(April 27, 2009 - Insidermedicine) In this video, Dr. Owen O'Connor, MD, PhD, Director of the Lymphoid Development and Malignancy Program at Herbert Irving Comprehensive Cancer Center, discusses what he would do if he had a non-healing mushroom-like lesion on his skin. Dr. O'Connor, Associate Professor of Medicine at Columbia University, is also Chief of the Lymphoma Service in the College of Physicians & Surgeons, Columbia University/New York Presbyterian Hospital.