Dalton joined HealthTree in 2024 as the CLL and MF Education Manager. He is passionate about helping patients gain a better understanding of their health and treatment and sees it as a way to help empower individuals and their families who are affected by these diseases. Prior to joining HealthTree Dalton earned a Master’s Degree in Oncological Sciences while studying various different blood cancers. When not interacting with patients he is an avid snowboarder and hiker.

John Mascarenhas, MD, is a Professor of Medicine at the Icahn School of Medicine at Mount Sinai. Dr. Mascarenhas is the Director of the Center of Excellence for Blood Cancers and Myeloid Disorders, directs the Adult Leukemia Program, and is a member of The Tisch Cancer Institute. His clinical and research focus centers around myeloproliferative neoplasms (MPNs) and acute myeloid leukemia (AML). Throughout his illustrative career, Dr. Mascarenhas has published over 275 papers, is the principal investigator for the National Cancer Institute sponsored Myeloproliferative Disease Research Consortium, and has served as principal investigator or study chair on numerous clinical trials geared toward innovative treatment approaches for MPNs and AML. Dr. Mascarenhas is widely recognized for his work in MPNs and is often invited to speak at conferences for his expertise in the field.