KEMENY, ISM / SCIENCE PHOTO LIBRARY KEMENY, ISM / SCIENCE PHOTO LIBRARY
Tonsil cancer. Light micrograph of a section through a tonsil of a patient with non-Hodgkin lymphoma. Tonsils are lymph nodes, which filter harmful organisms from tissue fluid. Non-Hodgkin lymphoma (NHL) is a cancer of the lymphocytes, a type of white blood cell in the body's immune system. In this case, the cancerous lymphocytes (circles with dark patches) are widely spread through the lymphoid tissue. NHL symptoms are varied and can include: lymph node enlargement, headaches, skin ulceration, loss of appetite, fever and constant fatigue. Treatment is by radiotherapy, anti-cancer drugs and, if necessary, bone marrow transplant. Magnification: x280 when printed 10 centimetres wide.
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