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Guidelines for Reporting Red Blood Cell Morphology

Cell Type

RBC Morphology Reporting Per High Power Field (400x)

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)
.

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)
....
Double Cell Population

Report if present

RBC Agglutination
Rouleaux

Guidelines for Reporting Red Blood Cell Morphology.pdf [click to view / print]

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