EGFR and glioblastoma: EGFR was highly expressed with ≥32 transcripts per million (TPM) in glioblastoma (GBM), low-grade glioma (LGG), kidney renal clear cell carcinoma (KIRC), esophageal carcinoma (ESCA) and head and neck squamous cell carcinoma (HNSC) (Figure 1A).