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

Slide 082 [100X]

The object indicated by the arrow is a giant platelet. This photomicrograph was taken form the March 1997 glass slide proficiency test event, Slide 005, hereditary spherocytosis. The presence of giant platelets was noted by 94 % of the participating laboratories laboratories participating in the March 1997 glass slide event. Normal platelets are 1 to 4 µm in size. Large platelets are 4 to 7µm and giant platelets are 7 to 8µm or larger. Brown BA, Hematology: Principles and Procedures, Lea & Febiger, Philadelphia, 1993, pp.78-82

NUMBER OF RESPONSES	% OF LABORATORIES	CELL CODE AND TYPE
462	97.5%	code: 52 Giant platelet
8	1.7%	code: 16 Hairy cell
1	0.2%	code: 51 Platelet
1	0.2%	code: 53 Platelet Satellitosis
1	0.2%	code: 0 No result reported
1	0.2%	code: 66 No such code

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