Monocytes are a type of white blood cell produced in the bone marrow. Resembling like amoeboid, they fight certain infections and help out other white blood cells to remove damaged dead tissues. They also destroy cancer cells and help to regulate immunity against foreign substances. A monocyte count is component of a complete blood count and is denoted as a ratio of monocytes to the overall count of white blood cells or by absolute numbers. Both may be useful in determining or refuting a possible diagnosis