We further analyzed the correlation of STAS with PD-1/PD-L1 expression (SP28-8 and SP142) and found significant relationships between STAS and PD-L1 expression level in tumor cells (p < 0.001) or stromal cells (p < 0.001), while PD-1 expression was correlated with STAS only in stromal cells (p < 0.001). The gene discussed is CD274; the disease is neoplasm.