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 - 75 53 0 - 80
Myeloblast/Promyelocyte 0 - 0 0 0 - 4
Lymphoblast/Prolymphocyte 0 - 67 0 0 - 74
*[Myelo+Lympho+Blasts,not classif.] 40 - 75 57 35 - 80
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 - 1 0 0 - 1
Metamyelocyte 0 - 1 0 0 - 1
Band neutrophil 0 - 5 1 0 - 6
Segmented neutrophil 6 - 18 12 4 - 20
*[Total neutrophils] 8 - 19 13 5 - 22
Eosinophil 0 - 2 0 0 - 2
Basophil 0 - 1 0 0 - 1
Lymphocyte 13 - 35 24 10 - 42
Atypical lymphocyte 0 - 2 0 0 - 9
Monocyte 0 - 3 1 0 - 4
Plasma cell 0 - 0 0 0 - 0
NRBC / 100 WBC 0 - 2 1 0 - 3
* 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 ( 9%) Slight ( 56%) Moderate ( 33%) MarKed ( 1%)
Poikilocytosis None None ( 54%) Slight ( 44%) Moderate ( 2%) MarKed ( 0%)
Macrocytosis None None ( 53%) Slight ( 41%) Moderate ( 6%) MarKed ( 0%)
Microcytosis None None ( 46%) Slight ( 37%) Moderate ( 15%) MarKed ( 1%)
Hypochromia None None ( 84%) Slight ( 15%) Moderate ( 1%) MarKed ( 0%)
Polychromasia Slight None ( 8%) Slight ( 58%) Moderate ( 32%) MarKed ( 2%)
Bizarre or irregular platelets Absent Absent( 99%) Present( 1%)
Clumped platelets Absent Absent(100%) Present( 0%)
Giant platelets Absent Absent( 94%) Present( 6%)
Platelet satellitosis Absent Absent(100%) Present( 0%)
Auer rods Absent Absent(100%) Present( 0%)
Döhle bodies Absent Absent(100%) Present( 0%)
Hypersegmentation Absent Absent( 99%) Present( 1%)
Pelger Huët anomaly Absent Absent(100%) Present( 0%)
Smudge / Basket cells Present Absent( 43%) Present( 57%)
Toxic granulation Absent Absent( 96%) Present( 4%)
Acanthocytes Absent Absent( 97%) Present( 3%)
Basophilic stippling Absent Absent( 60%) Present( 40%)
Blister cells (pre keratocytes) Absent Absent(100%) Present( 0%)
Cabot rings Absent Absent(100%) Present( 0%)
Echinocytes (crenated/burr cells) Absent Absent( 94%) Present( 6%)
Elliptocytes Absent Absent( 94%) Present( 6%)
Howell-Jolly bodies Absent Absent( 98%) Present( 2%)
Pappenheimer bodies Absent Absent(100%) Present( 0%)
Red cell agglutinates Absent Absent(100%) Present( 0%)
Rouleaux Absent Absent( 97%) Present( 3%)
Schistocytes Absent Absent( 87%) Present( 13%)
Schüffner's granules Absent Absent(100%) Present( 0%)
Sickle cells (drepanocytes) Absent Absent(100%) Present( 0%)
Spherocytes Absent Absent( 79%) Present( 21%)
Stomatocytes Absent Absent( 97%) Present( 3%)
Target cells (codocytes) Absent Absent( 88%) Present( 12%)
Tear drop cells (dacrocytes) Absent Absent( 75%) Present( 25%)
Bacteria Absent Absent(100%) Present( 0%)
Fungi/yeast Absent Absent(100%) Present( 0%)
Malaria/Babesiosis Absent Absent(100%) Present( 0%)
Stain precipitate Absent Absent( 95%) Present( 5%)
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