Table 1

Distribution of differential flags requiring manual peripheral blood smear review

Instrument flagsNo of flagged instances
Solid tumour malignancies, %Haematological malignancies, %
Nucleated red blood cells (NRBC) 512 (33)256 (20)
Blasts/abnormal lymphoid 386 (25)297 (23)
Monocytosis (≥1.5×103/µL or ≥30%)106 (7)167 (13)
Immature granulocytes 189 (12)137 (11)
WCC abnormal scattergram 123 (8)112 (9)
Atypical lymphoid 127 (8)51 (4)
Previous sample with blasts 65 (4)167 (13)
Eosinophilia (≥20%)35 (2)10 (0.8)
Absolute lymphocytosis (≥5×103/µL)25 (2)93 (7)
Basophilia (≥1×103/µL or ≥5%)4 (0.3)9 (0.7)
New patient with WCC >11×109/L 1 (0.1)1 (0.1)
Total flags 15731300
  • WCC, white cell count.