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#*Congenital hematopoietic disorder. | #*Congenital hematopoietic disorder. | ||
#**Congenital dyserythropoietic anemia. | #**Congenital dyserythropoietic anemia. | ||
=Bone marrow specimens= | |||
==Normal== | |||
*Age (years) ~ percentage of fat. | |||
**Example 80 years old has ~ 80% fat in marrow space. | |||
Erythroblasts: | |||
*Typically away from bone. | |||
Megakaryocytes: | |||
#Alone - not in clusters. | |||
#Not close to bone. | |||
Myeloid cells: | |||
*Adjacent to bone. | |||
=Histologic features= | =Histologic features= | ||
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*Non-lobated nuclei of any size. | *Non-lobated nuclei of any size. | ||
*Multiple widely separated nuclear lobes. | *Multiple widely separated nuclear lobes. | ||
=See also= | =See also= |
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