The ranges of cells in the normal bone marrow are listed in Table 1. They are wide ranges, but nearly all of the cells in a nondiagnostic bone marrow fall within these limits. Additional data that should be reported are the cellularity (normo-, hypo-, or hyper-cellular), an estimate of the number of megakaryocytes (normal, 3-10 per low-power field in the thickest part of the particle), and the M:E ratio. The amount of iron should be estimated from the iron stain and reported as decreased, normal, or increased. A description of the bone marrow should be reported that includes any variation from the normal. For instance, a shift to younger forms of the myelocytic series or any other cell type, or any abnormalities in the distribution of cells such as lymphocytes, eosinophils, and other cells should be reported. The most important part of the report is the diagnosis. Bone marrow reports should be signed by the hematologist or pathologist who is responsible for them.
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Course Section: 06. Microscopic Examination of the Bone Marrow
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