lymphoma (or Hodgkin's disease) is a cancer
that develops in the cells in the lymphatic system, small vessels located in various parts of your body:
armpits, groin, neck, and inside the abdomen. Cells specific for Hodgkin's lymphoma are called Reed-Sternberg (also called
Sternberg cell or Sternberg-Reed cell).
Lymph nodes are part of the
immune system of your body. Your immune system is your natural defense which helps your organism to fight
infection and all pathogenic attacks from bacteria and other harmful substances. The lymphatic system consists
of an interstitial fluid called lymph. Containing white blood cells, the lymph is purified from the lymph nodes
and then transported into the bloodstream by the lymphatic vessels.