Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Lymphoma is a cancer of the lymphocytes, a type of cell that forms part of the immune system. Typically, lymphoma is present as a solid tumor of lymphoid cells. Treatment might involve chemotherapy and in some cases radiotherapy and/or bone marrow transplantation, and can be curable depending on the histology, type, and stage of the disease. Learn more about lymphomas, their symptoms, diagnosis and treatment options, in this book.