DR GOPAL MURTI / SCIENCE PHOTO LIBRARY DR GOPAL MURTI / SCIENCE PHOTO LIBRARY
Leukaemia. Coloured scanning electron micrograph (SEM) of a lymphocytic leukaemia cell (upper centre), a cause of blood cancer. The cancerous cell is on a bone marrow fibroblast cell. Lymphocytic leukaemia is caused by a genetic mutation in a lymphocyte, a white blood cell which forms part of the immune system, whilst it is in blood-forming bone marrow. This cell and its descendents multiply rapidly, reducing the marrow's ability to produce normal blood cells. There are two forms of this leukaemia: acute, in which immature cells are produced, and chronic, in which mature-looking cells are produced. Magnification: x3,600 at 6x7cm size. Magnification: x12,600 at 7x9.5inch size.
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