1.  Diffuse large B-cell lymphoma(DLBCL)  This is the most common type of non-Hodgkin lymphoma in the world. It can affect any age group but mostly occurs inolder people (the average age is mid-60s). It usually starts as a quickly growing mass in a lymph node deep inside thebody such as in the chest, abdomen, neck or armpit. It can also start in other areas such as the intestines, bone or eventhe brain or spinal cord. It is slightly more common in men. Genetic tests have shown that there are different subtypesof DLBCL Mediastinal large B cell lymphoma-It develop enlarged lymph gland and accounts about 3% in UK.
Intravascular large B-cell lymphoma -In this rare subtype and found inside blood vessels, not in the lymph nodes or bone marrow.