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Investigations for isolated thrombocytopenia in the absence of a family history of bleeding.
| Complete blood count and film |
| Liver enzymes |
| Thyroid function tests |
| Vitamin B12 and folatea |
| HCV, HIV and HBV |
| Coagulation screen: aPTT and PT |
| Antinuclear antibody, anticardiolipin antibodies and lupus inhibitor |
| Medical imaging to assess spleen size |
aPTT: activated prothrombin time; PT: prothrombin time.
Folate deficiency is uncommon in countries with folate fortification.
