Figure 1

(a) Unstained and (b) Pap stained image of negative cytology specimen, X10. (c) Unstained and (d) Pap stained image of high-grade squamous intraepithelial lesion (HSIL) cytology specimen, X10. In (b,d), superficial cells are orange to pink in colour and intermediate cells are turquoise green to blue in colour.