Nonfunctional ARID1A was associated with the deficiency in DNA damage response, base excision repair (BER), nucleotide excision repair (NER), MMR, HRR, overexpression of cell cycle genes and PD-L1 pathway genes, POLE mutations, and overrepresentation of immune cell subtypes in the tumour microenvironment [70]. Here, CD274 is linked to neoplasm.