![]() ![]() This is due to disorders which affect cells in the bone marrow which make platelets. Too many platelets - this is called thrombocythaemia ( or thrombocytosis).This may make you bruise or bleed easily. Too few platelets - this is called thrombocytopenia.The type of leukaemia depends on the type of white cell affected. Leukaemia is a type of blood cancer where there is a large number of abnormal cells, usually white blood cells.Certain allergies can cause an eosinophilia.Various infections can cause an increase of white blood cells.Depending on which type of white cell is increased it is called neutrophilia, lymphocytosis, eosinophilia, monocytosis or basophilia. Too many white blood cells - this is called leucocytosis. ![]() Depending on which type of white cell is reduced it can be called neutropenia, lymphopenia or eosinopenia. Too few white cells - this is called leukopenia.Too many red cells - this is called polycythaemia and can be due to various causes.The cause of iron deficiency can be benign (for example, heavy periods), or very serious (for example bowel (colorectal) or stomach cancer). (Iron is needed to make haemoglobin.) With this type of anaemia, the average size of the red blood cells is smaller than normal. For example, the most common cause of anaemia in the UK is a lack of iro n. The average size of the red cells can give a clue as to the cause of some anaemias. ![]() The most common reason for an FBC to be done is to check for anaemia.
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