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 low white blood cell count, called leukopenia, can result from conditions such as: 1  Bone marrow damage (e.g., toxin, chemotherapy, radiation therapy, drugs)  Bone marrow disordersâthe bone marrow does not produce sufficient WBCs (e.g., myelodysplastic syndrome, vitamin B12 or folate deficiency)