New York State Department of Health - Wadsworth Center - Cytohematology Proficiency Testing

Slide 071 [100X]

The cell indicated by the arrow is an eosinophil. Eosinophils are characterized by the presence of large, reddish-orange staining granules, which are distributed throughout the cytoplasm. A segmented neutrophil is present in the same field for staining comparison. Thirty-eight laboratories classified this cell as a basophil. The cytoplasm of a basophil stains slightly pink to colorless, and contains specific dark purple to blue-black granules.

NUMBER OF RESPONSES	% OF RESPONSES	CELL CODE AND TYPE
438	91.6%	code: 13 Eosinophil
38	7.9%	code: 14 Basophil
1	0.2%	code: 12 Monocyte
1	0.2%	code: 0 No result

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