CD276 and esophageal squamous cell carcinoma: As demonstrated in Figure 1A, ESCC PSO (primary cancers surgically resected) and NC PSO (adjacent esophageal epithelium 2cm away from the proximal edge of ESCC) were co-cultured with iPSC CD276-targeted CAR-NK cells at the same dosage from day 1 to day 5 (Figure 2A).