Non-Hodgkin's lymphomas are cancers of the lymphatic system
There are two main types of lymphoma: non-Hodgkin's lymphomas and Hodgkin's disease
Lymphoma cells have the ability to spread beyond the original site. They usually spread first to other lymph nodes / glands in the lymphatic system, but can also enter the bloodstream which carries them to various organs
When the cells reach a new site they may go on dividing and form a new tumour
