What should i know about lymph node cancer?

Lymphoma: Lymphoma is a type of cancer that occurs when white blood cells (lymphocytes) behave irregularly. Abnorma lymphocytes may divide more frequently and can form "nodules". Lymphoma may develop in many parts of the body, including the lymph nodes, bone marrow, spleen, other organs. Lymphoma is divided into two main types - hodgkin's and non hodgkin's and several subtypes. Cancer.Gov for more info.