Sean Christensen, MD, PhD, has been practicing dermatologic surgery since completing training in Mohs surgery and cutaneous oncology in 2013. His referral-based clinical practice is limited to the management of skin cancer, including Mohs surgery, treatment of early stage melanoma, and surgical reconstruction. In addition, Dr. Christensen focuses on complex skin cancer issues such as field cancerization, preventive strategies in high risk patients, and management of advanced or aggressive non-melanoma skin cancer. He is Director of Resident Education in dermatologic surgery, Associate Director of the ACGME Mohs Surgery and Cutaneous Oncology fellowship at Yale, and Director of Dermatologic Surgery at Yale Dermatology Branford. Dr. Christensen has an active research portfolio as well. Current research projects include defining the molecular and genetic changes that precede skin cancer development and optimizing field treatment strategies to decrease the risk of subsequent skin cancer. Dr. Christensen has published and lectured nationally, including a popular forum on field cancerization at the Annual Meeting of the American Academy of Dermatology. He is also a principal investigator in a phase III clinical trial of a novel topical therapy for basal cell carcinoma.