Non-Hodgkin lymphoma is a blood cancer that appears as a solid tumour in the glands, usually of the neck, chest, armpit or groin.
Non-Hodgkin lymphomas can be divided into two main types according to what kind of lymphocyte they . . . . . . develop from. There are three types of lymphocyte, B cells, T cells and NK cells. This means that you can have a B-cell non-Hodgkin lymphoma (which is the more common kind) or a T-cell or NK-cell non-Hodgkin lymphoma.