Lymphoma is a form of cancer that attacks lymphatic tissue and especially affects lymphocytes, a type of white blood cell. It is the seventh most common form of cancer across the world and accounts for about 3% to 4% of all cases in the United States. Though it can occur at any age, lymphoma is the most common cancer affecting teens and young adults.
While four different forms of lymphoma are identified by the World Health Organization, two are most commonly recognized: Hodgkin's and non-Hodgkin's. Hodgkin's lymphoma is distinguished by the Reed-Sternberg cell, a distinctive type of cell that increases in number as Hodgkin's lymphoma progresses. It is more treatable than non-Hodgkin's lymphoma, which refers to all other types of lymphoma. Non-Hodgkin's lymphoma generally affects elderly individuals.
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