Infectious Diseases Services

The Infectious Disease clinical service works closely with other medical oncology departments at Roswell Park. They are available for consultations through the many disease services at the hospital.


Brahm Segal, MD, Chief of Infectious Diseases

Dr. Segal is the Chief of Infectious Diseases and Professor of Oncology at Roswell Park and Professor of Medicine and Vice Chair of Faculty Development at the University at Buffalo School of Medicine and Biomedical Sciences. He is an Associate Member in the Dept. of Immunology and a member of the Tumor Immunology Program at Roswell Park. Dr. Segal’s clinical interests relate to infections in immunocompromised patients, such as those with cancer and stem cell transplant recipients.  His lab studies NADPH oxidase as a major regulator of host defense and inflammation. Prior to joining Roswell Park, Dr. Segal completed a fellowship in Infectious Diseases at the National Institute of Allergy and Infectious Disease, National Institute of Health (NIH), Bethesda, MD. Dr. Segal has authored or co-authored more than 90 peer-reviewed publications as well as numerous book chapters. He has served on several panels that establish clinical practice guidelines (e.g., IDSA, CDC, NCCN) and has lectured widely on clinical medicine and basic science research.

Nick Almyroudis, MD

Nikolaos Almyroudis

Dr. Almyroudis joined Roswell Park in the summer of 2004 after completing fellowships at the University of South Florida in Infectious Diseases and at Memorial Sloan Kettering Cancer Center in Stem Cell Transplants. His research focuses on opportunistic infections in allogeneic hemopoietic stem cell transplant patients. Dr. Almyroudis is currently researching the epidemiology of VRE in oncology patients to determine modes of transmission, pathogenesis, and mortality rates due to particularly resistant strains. He is an Assistant Professor of Medicine in the Department of Medicine at Roswell Park, as well as an Assistant Professor of Medicine at the University at Buffalo School of Medicine and Biomedical Sciences.  

Ryosuke Osawa, MD

Dr. Osawa joined Roswell Park as a Consulting Physician for Infectious Diseases in 2010. He has completed fellowships at the University of Pittsburgh Medical Center in Infectious Diseases and Transplant Infectious Diseases. Dr. Osawa’s research interests include cost-effective analyses of pre-transplant evaluations for opportunistic infections, cytomegalovirus reactivation in critically ill patients, and fungal infections in immunocompromised hosts. He is a Clinical Assistant Professor at the University at Buffalo School of Medicine and Biomedical Sciences and also works as Consulting Physician at Buffalo General Hospital.

General Contact Info:

Millie Sorrento

Millie Sorrento has been at Roswell Park since 2003. She is a Principle Secretary in the Department of Medicine and is the Assistant to Drs. Segal and Almyroudis. Millie and the Infectious Diseases Department can be reached at (716) 845-5721.