Expression of PD‐L1, PD‐1 and CTLA‐4 mRNA was observed in pigmented and/or non‐pigmented atypical cells with vesicular nuclei and prominent nucleoli interpreted as tumour cells, as well as in non‐tumour cells, mostly characterised by scant cytoplasm, interpreted as small lymphocytes (Figure 1A,D,G). Here, CD274 is linked to neoplasm.