Radiation Medicine Rounds is a trinary hard cover periodical designed to provide an up-to- date review of a dedicated radiation medicine topic of interest to clinicians and scientists who are involved in the care of patients receiving radiotherapy. It is intended to serve as both a reference and instructional tool for students, housestaff, fellows, practicing clinicians, medical physicists, cancer biologists, radiobiologists, and interdisciplinary colleagues throughout the oncology spectrum. This issue of Radiation Medicine Rounds discusses the more salient topics surrounding the role of radiation therapy for hematologic malignancies. There are literally dozens of distinct lymphoma subtypes, each with its own unique molecular and clinical features. Although systemic cytotoxic and targeted therapies have improved dramatically, radiation therapy remains an important modality for optimal clinical outcomes. With contributions from nationally recognized experts, Hematologic Malignancies offers an overview of the full spectrum of therapy for hematologic malignancies ranging from lymphoma and leukemia to plasma cell dyscrasias. Recent advances in radiotherapy for hematologic malignancies allow for maintenance of excellent local control with improvements in toxicity achieved through reductions in field sizes, in dose delivered, and increasingly conformal delivery techniques. Hematologic Malignancies provides the practitioner with a current overview of best practices, recent research, and future directions in the management of these complex cancers.