Cytohematology Proficiency Testing 2 February 1998
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Cell Classification or Finding Expected Range Participant Median Participant Range
------------------------------ -------------- ------------------ -----------------------
Blast cell not classified 0 - 0 0 0 - 4
Myeloblast/Promyelocyte 0 - 0 0 0 - 0
Lymphoblast/Prolymphocyte 0 - 0 0 0 - 1
Monoblast/Promonocyte 0 - 0 0 0 - 0
Erythroblast/Pronormoblast 0 - 0 0 0 - 0
Lymphoma cell 0 - 0 0 0 - 0
Hairy cell 0 - 0 0 0 - 0
Myelocyte 0 - 3 1 0 - 3
Metamyelocyte 0 - 2 1 0 - 3
Band neutrophil 0 - 11 5 0 - 14
Segmented neutrophil 10 - 24 16 7 - 28
*[Total neutrophils] 14 - 30 21 11 - 34
Eosinophil 0 - 2 0 0 - 2
Basophil 0 - 1 0 0 - 1
Lymphocyte 5 - 35 20 3 - 41
Atypical lymphocyte 20 - 75 54 20 - 79
Monocyte 0 - 8 2 0 - 11
Plasma cell 0 - 0 0 0 - 0
NRBC / 100 WBC 0 - 2 0 0 - 5
* Obtained by combining individual results.
** Participant range is the central 98 percentile of all participant results.
Cell Classification or Finding Expected Result Participant Results
------------------------------ --------------- -----------------------------------------------------------
Anisocytosis Slight None ( 37%) Slight ( 59%) Moderate ( 4%) MarKed ( 0%)
Poikilocytosis None None ( 74%) Slight ( 25%) Moderate ( 1%) MarKed ( 0%)
Macrocytosis None None ( 90%) Slight ( 9%) Moderate ( 0%) MarKed ( 0%)
Microcytosis None None ( 77%) Slight ( 19%) Moderate ( 3%) MarKed ( 0%)
Hypochromia None None ( 90%) Slight ( 9%) Moderate ( 1%) MarKed ( 0%)
Polychromasia None None ( 52%) Slight ( 47%) Moderate ( 1%) MarKed ( 0%)
Bizarre or irregular platelets Absent Absent( 99%) Present( 1%)
Clumped platelets Absent Absent( 99%) Present( 1%)
Giant platelets Absent Absent( 91%) Present( 9%)
Platelet satellitosis Absent Absent(100%) Present( 0%)
Auer rods Absent Absent(100%) Present( 0%)
Döhle bodies Absent Absent(100%) Present( 0%)
Hypersegmentation Absent Absent(100%) Present( 0%)
Pelger Huët anomaly Absent Absent(100%) Present( 0%)
Smudge / Basket cells Absent Absent( 54%) Present( 46%)
Toxic granulation Absent Absent( 88%) Present( 12%)
Acanthocytes Absent Absent( 98%) Present( 2%)
Basophilic stippling Absent Absent( 92%) Present( 8%)
Blister cells (pre keratocytes) Absent Absent(100%) Present( 0%)
Cabot rings Absent Absent(100%) Present( 0%)
Echinocytes (crenated/burr cells) Absent Absent( 85%) Present( 15%)
Elliptocytes Absent Absent( 97%) Present( 3%)
Howell-Jolly bodies Absent Absent( 97%) Present( 3%)
Pappenheimer bodies Absent Absent(100%) Present( 0%)
Red cell agglutinates Absent Absent(100%) Present( 0%)
Rouleaux Absent Absent( 95%) Present( 5%)
Schistocytes Absent Absent( 98%) Present( 2%)
Schüffner's granules Absent Absent(100%) Present( 0%)
Sickle cells (drepanocytes) Absent Absent(100%) Present( 0%)
Spherocytes Absent Absent( 90%) Present( 10%)
Stomatocytes Absent Absent( 99%) Present( 1%)
Target cells (codocytes) Absent Absent( 83%) Present( 17%)
Tear drop cells (dacrocytes) Absent Absent( 95%) Present( 5%)
Bacteria Absent Absent(100%) Present( 0%)
Fungi/yeast Absent Absent(100%) Present( 0%)
Malaria/Babesiosis Absent Absent(100%) Present( 0%)
Stain precipitate Absent Absent( 97%) Present( 3%)
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