Case Report
Pseudothrombocytopenia due to Platelet Clumping: A Case Report and Brief Review of the Literature
Table 2
Comparison between EDTA-associated and vWD type 2B-associated platelet clumping.
| Distinguishable features | EDTA-associated | vWD type 2B-associated |
| Clumping | Due to in vitro process | Due to in vivo process | Bleeding tendency | None | Characteristic | MPV | Normal | Increased due to left shift | Further work-up to confirm platelet clumping | Testing citrate or heparin anticoagulated sample, others | (1) Platelet aggregation studies using low ristocetin concentration (2) Molecular testing (Exon 28 sequencing) |
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