NCIt definition : Malignant neoplasms that either originate from the bone marrow (e.g. myeloid leukemias)
or involve the bone marrow as secondary-metastatic tumors (e.g. metastatic carcinomas
to the bone marrow).;
Alternative definition : NCI-GLOSS: Cancer that forms in the blood-forming stem cells of the bone marrow (soft
sponge-like tissue in the center of most bones). Bone marrow cancer includes leukemias
and multiple myeloma.;