 | Platelet SatellitismMorphology:
Platelets clumped around neutrophils. Found in:
EDTA in vitro induced change of no clinical significance except false low platelet count (in vitro). |
| Giant PlateletsMorphology:
Platelet larger than a normal red cell. Found in:
Increased platelet turnover
Myeloproliferative disorders
Myelodysplastic disorders |
| Large PlateletsMorphology:
Large platelets - larger than one third but less than the size of a red cell. Found in:
Increased turnover of platelets
Myeloproliferative disorders
Myelodysplastic disorders
May Hegglin anomaly
Grey platelet syndrome
Bernard Soulier |
| Micro ClotsMorphology:
Fibrin strands, platelets and white cells (in this case - neutrophils) clumped together. Found in:
In vitro artefact caused by poor venesection technique
Leads to false low counts - can influence white cell, red cell and platelet counts |
| Platelet ClumpingMorphology:
Small clumps of platelets. Found in:
In vitro artefact caused by EDTA or cold and leads to false low platelet count
Difficult venesection |
| Wiskott Aldrich SyndromeMorphology:
Small platelets. Found in:
Wiskott Aldrich syndrome |
| Grey Platelet SyndromeMorphology:
Platelets appear degranulated. Found in:
Grey platelet syndrome
Discharge of platelet granules in vivo (cardiopulmonary bypass, hairy cell leukemia)
Discharge of platelet granules in vitro (poor venesection technique) |
