Extended Data Fig. 3: Immunofluorescence staining of EGFR CAR and IL13Ra2 CAR targets in patient pre-infusion tumor tissue.

Tumor tissue obtained at the time of Ommaya placement was stained for both CAR targets. All 6 patients treated demonstrated expression of one or both targets throughout their tumor. All images taken at 20x magnification. Staining was performed in duplicate. Scale bar = 100 μm.