Aaron Auerbach, MD, MPH, is the senior hematopathologist at the Joint Pathology Center in Silver Spring, Maryland, where he delivers expertise in both hematopathology and gastrointestinal pathology. He is the author of the prior and upcoming editions of Diagnostic Pathology: Molecular Oncology (2019 and 2023), and the sole author of Diagnostic Pathology: Spleen (2022).