A differential blood test enables a doctor to determine how many white blood cells are in the body. There are five types of white blood cell, and the test also shows how many of each type are present.

A differential blood count is a blood test to check your white blood cell levels, which can indicate the presence of infection, disease, or an allergic reaction. Your doctor might order it as part of ...

Blood tests may be the first step in diagnosing leukemia. However, additional testing is usually needed to make an accurate diagnosis. Leukemia is cancer that starts in bone marrow stem cells. These ...