First discovered in the maturing mammalian reticulocyte (immature red blood cell)

Chronic phase chronic myelogenous leukemia is a phase of chronic myelogenous leukemia in which 5% or fewer of the cells in the blood and bone marrow are blast cells (immature blood cells).

In this phase, 6% to 30% of the cells in the blood and bone marrow are blast cells (immature blood cells).

Blastic phase chronic myelogenous leukemia is a phase of chronic myelogenous leukemia in which more than 30% of the cells in the blood or bone marrow are blast cells (immature blood cells).

Atypical chronic myelogenous leukemia is a disease in which too many granulocytes (immature white blood cells) are made in the bone marrow.

Precursor T-cell lymphoblastic leukemia is a form of lymphoid leukemia, in which too many T-cell lymphoblasts (immature white blood cells) are found in the blood and bone marrow.

Before treatment with samarium, stem cells (immature blood cells) are removed from the blood or bone marrow of the patient and are frozen and stored.

Precursor T-lymphoblastic lymphoma is a type of non-Hodgkin lymphoma in which too many T-cell lymphoblasts (immature white blood cells) are found in the lymph nodes and spleen.

This color is seen because of the ribosomes still left on the immature blood cells, which are not found on mature red blood cells.

Stem cells (immature blood cells) are removed from the blood or bone marrow of a donor.