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

Slide 060 [100X]

This slide was taken from a 15 year-old male with infectious mononucleosis. The three atypical lymphocytes are irregularly shaped and are indented by the surrounding red blood cells. The cytoplasm shows a deeper basophilia at the outside edge near the red blood cells.

NUMBER OF RESPONSES	% OF LABORATORIES	CELL CODE AND TYPE
455	94.4%	Code:11 Atypical lymphocyte
13	2.7%	Code:12 Monocyte
7	1.5%	Code:17 Smudge cell
6	1.2%	Code:10 Normal lymphocyte
1	0.2%	Code:4 Monoblast

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