Stanley P. Leong, MD, is Chief of Cutaneous Oncology at the California Pacific Medical Center and a Senior Scientist at the California Pacific Medical Center Research Institute. Dr. Leong is also the President of Sentinel Node Oncology Foundation. His specialty is in surgical oncology. He is an expert in melanoma and breast cancer sentinel lymph node surgery. Under the auspice of the Sentinel Node Oncology Foundation, Dr. Leong and his fellow surgical oncologists have formed the Sentinel Lymph Node Oncology Working Group, in which each principle investigator submits his or her melanoma patient sentinel lymph node database to combine into a multicenter mega database so that the clinical outcomes of subgroup of melanoma patients can be better analyzed and defined. Such new knowledge will guide better and more effective treatments for melanoma patients. To date, there have been 18 publications from this multicenter surgical group.  Dr. Leong also conducts research on the role of sentinel lymph nodes in cancer metastasis and the impact of micrometastasis. He is a co-investigator in cancer immunotherapy for adjuvant therapy for high-risk melanoma patients and also for those with metastatic melanoma. As a chair, Dr. Leong has conducted International Cancer Metastasis Symposium biennially for the past 10 years (www.cancermetastasis.org). The theme of the Symposium is to track the single cell in our body, which has become a mutant cell, with resultant mutants being selected to become the fittest clone to metastasize through the lymphovascular system. In 2015, Dr. Leong, Saskia Thiadens and Dr. Witte were Co-Presidents of the 25^th World Congress of Lymphology being held in San Francisco.