The data was arranged into 4 quartiles based on ARID1A expression derived from mRNA-seq z-scores, defining the lowest quartile (Q1) as low ARID1A and highest quartile (Q4) as high ARID1A. We examined how ARID1A expression levels correlated with a) PD-L1 expression and b) microsatellite analysis for normal-tumor instability (MANTIS) score [6]. The gene discussed is CD274; the disease is neoplasm.