Includes the latest information on lymphoma diagnosis, treatment, and incidence and describes recent updates to the WHO system of lymphoma classification and staging. The author discusses new targeted therapies like ibrutinib and idelalisib and describes how some treatments, including radiation therapy and stem cell transplants, have been modified while others have been discontinued. She also addresses new developments, such as the use of medical marijuana and the question of whether lack of sunlight and vitamin D play a role in the development of lymphoma.