PR. J. BERNARD / CNRI / SCIENCE PHOTO LIBRARY PR. J. BERNARD / CNRI / SCIENCE PHOTO LIBRARY
Chronic lymphocytic leukaemia. Light micrograph of blood cells sampled from a lymphatic ganglion in a case of chronic lymphocytic leukaemia, also called chronic lymphoid leukaemia (CLL). Leukaemia is a cancer where certain blood cells form in excess. There are several forms, classified according to the type of cell affected. CLL is a cancer where excess white blood cells called lymphocytes form. Present here are lymphocytes, lymphoblasts (immature lymphocytes) and basophils (a different sort of white blood cell). The white blood cells are purple, while red blood cells are pale orange.
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