Cancerous breast tissue was characterized by more intense and higher proportions of CELF1 staining (mean per cent score 66.7, s.d. 34.7, median score 80 and 35% of tumours were scored at 100%) as compared with non-cancerous tissue (mean per cent score 30.7, s.d. 33.6, median score 10 and 4% of data were scored at 100%; Fig. 7e and Supplementary Fig. 6a,b). This evidence concerns the gene CELF1 and neoplasm.