Define in session: in the process of meeting formally; conducting classes â in session in a sentence in the process of meeting formally; conducting classesâ¦ See the full definition
This condition can be caused by certain medications and by infections. In some cases, it is caused by a cancer or precancerous condition. Myelofibrosis, bone marrow scarring that can result from various hematologic cancers, typically leads to low blood counts. Pancytopenia can also be caused by aplastic anemia, a bone marrow failure disorder that affects blood cell production.
A lower than normal white blood cell count is called leukopenia. A decreased WBC count may be due to: 1  Autoimmune diseases (such as systemic lupus erythematosus)  Bone marrow failure (for example, due to infection, tumor, radiation, or fibrosis)