Leukemia, Hodgkin and non-Hodgkin lymphoma, myeloma and myelodysplastic syndromes are cancers that originate in the bone marrow or lymphatic tissues. They are considered to be related cancers because they involve the uncontrolled growth of cells with similar functions and origins. The diseases result from an acquired genetic injury to the DNA of a single cell, which becomes abnormal (malignant) and multiplies continuously. The accumulation of malignant cells interferes with the body's production of healthy blood cells.
The previous information is from the Society and there is more info at: