Oscar Colegio, MD, PhD

Professor of Oncology
Chair of the Department of Dermatology
Roswell Park Comprehensive Cancer Center
Areas of Expertise: 
Cutaneous squamous cell carcinoma
Basal cell carcinoma
Skin diseases in transplant recipients
Special Interests: 
Skin diseases in the immunosuppressed


At Roswell Park Comprehensive Cancer Center, my clinical practice and research is focused on immunodeficiency-associated skin cancers and skin disorders associated with solid organ transplantation. My research has centered on defining the role of immune cells called macrophages in tumor progression. The focus of these studies has been to identify pathways of tumorigenesis critical to a variety of murine tumor types including lung carcinoma, melanoma, colon carcinoma and cutaneous squamous cell carcinoma. Parallel studies in identifying tumor-promoting pathways induced by infiltrating macrophages in human cutaneous squamous cell carcinomas from immunosuppressed versus non-immunosuppressed patients is the current focus of our lab.

I am a member of several professional organizations related to my clinical and research interests. Specifically, I am the president-elect of the International Transplant Skin Cancer Collaborative, the largest international organization dedicated to studying and treating skin diseases that develop after solid organ transplantation. Further, I am also a member of the American Academy of Dermatology, Society for Investigative Dermatology and American Dermatologic Association.

As a native Texan, I graduated from The University of Texas, where I earned a BS in Pharmacy in 1995, and of Yale University where I earned a PhD in Cell Biology in 2003 and an MD, with election to Alpha Omega Alpha medical honor society, in 2004. I completed an Internship in Internal Medicine and a Residency in Dermatology at Yale-New Haven Hospital. In 2015, I was honored to receive the Young Physician-Scientist Award of the American Society for Clinical Investigation and the 2017 Young Investigator Award of the American Academy of Dermatology. 


Education and Training: 
2004 - MD - Medicine, Yale University, New Haven, CT
2003 - PhD - Cell Biology, Yale University, New Haven, CT
1995 - BS - Pharmacy. RPh., University of Texas, Austin, TX
2005-2008 - Resident, Dermatology, Yale New Haven Hospital, New Haven, CT
2004-2005 - Intern, Internal Medicine, Yale New Haven Hospital, New Haven, CT
2008-2009 - Postdoctoral Fellow in Immunobiology, Yale School of Medicine, New Haven, CT
Board Certification: 
2008 - American Board of Dermatology
1995 - Texas State Board of Pharmacy
Professional Memberships: 
2018-2020 - International Transplant Skin Cancer Collaborative - President-Elect and Vice President
2015-present - American Academy of Dermatology - Member, Mentoring Task Force
2017-present - Society for Investigative Dermatology (SID) - Charter Member, Committee on Diversity & Inclusion, Society for Investigative Derm
Honors and Awards: 
2018 - Lawrence P. & Joan Castellani Family Endowed Chair in Dermatology
2018 - Société Française de Dermatologie – Honorary Member
2017 - American Academy of Dermatology – Young Investigator Award
2017 - Yale Dermatology - 12th Annual Jeffrey Schechner Memorial Lecture
2015 - American Society of Clinical Investigation Young Physician-Scientist Award
Professional Experience: 
2016–2018 - Associate Professor of Dermatology, Pathology, and Surgery, Yale University, New Haven, CT
2010–2016 - Assistant Professor of Dermatology and Pathology, Yale University, New Haven, CT
2009–2010 - Instructor of Dermatology, Yale University, New Haven, CT
2008–2009 - Clinical Instructor of Dermatology, Yale-New Haven Hospital, New Haven, CT