CellMasters 2025
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Hematology
B12 deficiency - Slide 3
This slide from an 80-year-old patient shows well the erythropoietic stress that vitamin B12 deficiency can cause. The smear shows an enormous number of fragmentocytes, erythrocytes with basophilic stippling and Cabot rings.
ParameterRef.Units
Hemoglobin
4.5
7.2-9.5mmol/L
MCV
136
83-100fL
RDW
26
12-15%
LDH
4280
<248U/L
Vitamin B12
88
130-500pmol/L
XN Scatterplots
Peripheral blood
Basophilic Stippling
Cabot Rings
Hypersegmentation
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