Lymphoma is a malignancy of lymphocytes and is the most common haematological malignancy. The two main categories are Hodgkin and Non-Hodgkin lymphoma (NHL), of which 90% are NHL. Other categories of lymphoma include multiple myeloma and immunoproliferative diseases. Lymphoma makes up 3-4% of all cancers with a five-year survival rate between 70-85% depending on the type of lymphoma. Treatment is dependent on the type but also the grade – high or low grade. This determines aggressiveness of therapy.