Fat cells and RBC ratio is 1:1 Fat to Cell ratio ... should be 1:1 so 1/2 hemopoietic cells and 1/2 are fat cells ... hyperplasia depending on the overall cellularity of the bone marrow. Blasts ... irregular and jagged RBC fragments w/ no central pallor Reference: textbook of Pathology ,7th edition ,18 Harsha Mohan, page number 264 table 10.2