Table 1: Guidelines for Reporting Red Blood Cell Morphology - LabCE.com, Laboratory Continuing Education

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Table 1: Guidelines for Reporting Red Blood Cell Morphology

Cell Type	RBC Morphology Reporting Per High Power Field (1000x)
	Few	Moderate	Many
Acanthocytes (spur cells)	Up to 1% of the field or 1–2 cells per field	1–2.5% of the field or 3–5 cells per field	>2.5% of the field or >5 cells per field
Fragmented red cells (schistocytes, helmet cells, keratocytes/horn cells)
Polychromatophilic cells
Sickle cells (drepanocytes)
Spherocytes
Teardrop cells (dacrocytes)
Cell Type	Few	Moderate	Many
Echinocytes (burr cells)	5–25% of the field or 10–50 cells per field	25–50% of the field or 51–100 cells per field	>50% of the field or >100 cells per field
Hypochromic cells
Macrocytes
Microcytes
Ovalocytes (elliptocytes)
Stomatocytes
Target cells (codocytes)
Other RBC Morphologic Abnormalities
Double Cell Population	Report if present
RBC Agglutination
Rouleaux