CHGA and neoplasm: After cellular annotation of the 6 tumour cell types based on marker gene expression, we were able to identify the following: C0 PSCA+ tumour cells, C1 CLDN7+ tumour cells, C2 UBE2C+ tumour cells, C3 MUC6+ tumour cells, C4 CHGA+ tumour cells and C5 MUC2+ tumour cells.