In 1944, Jan G. Waldenström, MD, published his observations about a series of patients who presented with anemia, hepatosplenomegaly, hyperviscosity, bleeding, lymphoplasmacytic infiltrate in the bone marrow, and a large serum protein or “macroglobulin.”1 Today, Waldenström’s macroglobulinemia, also known as lymphoplasmacytic lymphoma, a type of non-Hodgkin lymphoma, is classified as a rare, indolent, and heterogeneous type of lymphoma of the lymphatic system.
Mantle-cell lymphoma is a rare and fast-growing type of non-Hodgkin lymphoma (NHL), comprising approximately ≥4% of NHL cases in the United States. Mantle-cell lymphoma most often affects men aged ≥60 years, and the key factors affecting prognosis include the patient’s age, performance status, lactate dehydrogenase levels, and white blood cell count.
Marginal-zone lymphoma (MZL) arises from B-lymphocytes in the marginal zone of lymphoid tissue. This slow-growing indolent B-cell lymphoma represents approximately 12% of all cases of non-Hodgkin lymphoma (NHL) in adults. MZL is divided into 3 subtypes, including mucosa-associated lymphoid tissue (MALT), nodal MZL, and splenic MZL. MALT lymphoma is the most common of these subtypes and occurs in the stomach, intestines, salivary glands, thyroid, eyes, and lungs. In MALT lymphoma, autoimmune processes or chronic infection cause B-cells to accumulate. Helicobacter pylori is 1 of at least 6 microbial species associated with lymphoproliferation in gastric MALT lymphoma.
Diffuse large B-cell lymphoma (DLBCL), a form of cancer that starts in the lymphatic system, is the most common type of non-Hodgkin lymphoma (NHL) in adults. In the United States, approximately 72,000 new cases of NHL are diagnosed annually; more than 20,000 people were estimated to die from the disease in 2017.
Lead investigator Joseph M. Connors, MD, FRCPC, Clinical Director, Centre for Lymphoid Cancer, British Columbia Cancer Agency, Vancouver, Canada, reported the results of the phase 3 ECHELON-1 clinical trial, which were also published online (Connors JM, et al. N Engl J Med. 2018;378:331-344) to coincide with the ASH meeting.
Among patients with untreated follicular lymphoma, 75% achieved complete responses with the 3-drug combination of atezolizumab (Tecentriq), obinutuzumab (Gazyva), and bendamustine (Treanda), results of a small, preliminary clinical trial reported at ASH 2017 showed.