A majority of non-Hodgkin's lymphomas begin in the lymph nodes.
About 20% start in other organs, such as the lungs, liver or the gastrointestinal tract.
The plural of lymphoma is lymphomas.
The exact cause of non-Hodgkin's lymphomas is not known.
Bone marrow transplantation is used in cases where the lymphomas do not respond to conventional therapy, or in cases where the patient has had a relapse or suffers from recurrent lymphomas.
Enlargement of the lymph nodes, liver, or spleen may suggest lymphomas.
The indolent nature of most MALT lymphomas means that the majority of patients are diagnosed at early stages with relatively nonspecific symptoms.
MALT lymphomas occur at a frequency of about 1.5 per 100,000 people per year in the United States and account for about 10% of all non-Hodgkin's lymphomas.
B cell lymphomas are more common among adults, while among children, the incidence of T and B cell lymphomas are almost equal.
MALT lymphomas are generally indolent, that is, they grow slowly and cause little in the way of symptoms.
It is not known if infectious agents also cause MALT lymphomas outside of the stomach.
MALT lymphomas are then recognized as areas of inflammation or ulceration within the stomach.
At present, there are no special tests that are available for early detection of non-Hodgkin's lymphomas.