EGFR and normal pressure hydrocephalus: However, patients who did not present with IICP symptoms (only presenting with NPH symptoms: 14.00 ± 5.75 months vs. IICP: 4.09 ± 0.97 months; p = 0.039) and patients postoperatively treated by EGFR-TKI (postoperative EGFR-TKI treatment: 9.65 ± 3.59 months vs. no postoperative EGFR-TKI treatment: 1.26 ± 1.26 months; p = 0.012) showed prolonged SFP after shunt surgery, each with statistical significance, in the high preoperative KPS group (high KPS: 9.74 ± 3.09 months vs. low KPS: 3.59 ± 1.14 months; p = 0.030).