High white blood cell counts can be caused by infections, inflammation, or cancer. Pregnancy often leads to an increased white blood cell count due to physical stress. Medications such as ...

A person has leukopenia if they have a reduced number of total white blood cells in their blood. According to the Leukemia & Lymphoma Society, a healthy white blood cell count is 5,000–10,000 white ...

MPNs involve overproduction of blood cells, while MDS results in poorly formed cells, affecting blood cell function and counts. Diagnosis requires blood tests, bone marrow biopsy, and genetic testing ...