Figure 1 shows paraffin sections from one CIN1 lesion (a–d) and two cervical cancers (e, f, g, h), stained with: methyl-green after cancer tissue had been removed by microdissection (a), FHIT antibody (b, e, g), PCNA antibody (c) and H&E (d, f, h). The gene discussed is PCNA; the disease is cervical cancer.