Non-Hodgkin's lymphoma, light micrograph
Light micrograph section through human tissue showing Non-Hodgkin's lymphoma. This is a type of cancer that affects the lymphatic system, a network of vessels and glands found throughout the body. The main symptom is swollen glands that persist. Treatments range from chemotherapy to anti-cancer medicines called monoclonal antibodies. The disease is more common in people who have a weakened immune system., by NIGEL DOWNER/SCIENCE PHOTO LIBRARY
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