Final answer:
The most common tumor in lymph tissue is non-Hodgkin's lymphoma, with over 70,000 cases in the U.S. annually, significantly more frequent than the 8,000 cases of Hodgkin's lymphoma.
Step-by-step explanation:
The most common tumor found in lymph tissue is non-Hodgkin's lymphoma (NHL), not Hodgkin's disease or autoimmune diseases. NHL is a type of cancer that originates in the lymph nodes and affects either B or T lymphocytes. It is more prevalent than Hodgkin's lymphoma, with over 70,000 cases diagnosed annually in the U.S. compared to about 8,000 cases of Hodgkin's lymphoma. Furthermore, there are many subtypes of NHL, amounting to around 60 different subtypes that vary based on which particular cells are affected.
Among these, Diffuse Large B-Cell Lymphoma (DLBCL) is one of the most aggressive types where early detection and proper treatment can result in a cure rate of approximately 70%.