Of the most significantly differential enrichment on H3K4me3 and/or H3K27ac marks between SCC and ADC tumours (Supplementary Fig. 5c and Supplementary Tables 1–4), we found much higher load of H3K27ac and H3K4me3 marks in the SCC tumour compared to the ADC tumour on the squamous genes Sox2, ΔNp63, Ngfr and Krt5/6 (Fig. 5b and Supplementary Fig. 5a). Here, NGFR is linked to AIDS dementia complex.