10 patients with mesothelin positive relapsed/refractory solid cancers after failure to standard therapies were treated with aPD1-MSLN-CAR T cells...After aPD1-MSLN-mRNA-CAR T cells treatment, 2 patients (20%) achieved partial response (PR), 4 (40%) remained stable (SD), and the rest 4 (40%) patients developed disease progression (PD)….These findings lend support that the combination of modified CAR T cells targeting MSLN with PD1 inhibition for solid tumors is safe.