However, patients who did present with IICP symptoms (only presenting with NPH symptoms: 19.58 ± 6.45 months vs. IICP: 6.19 ± 1.25 months; p = 0.013) postoperatively and patients treated by EGFR-TKI (postoperative EGFR-TKI treatment: 13.12 ± 3.63 months vs. no postoperative EGFR-TKI treatment: 6.14 ± 1.67 months; p = 0.021) showed prolonged OS after shunt surgery, each with statistical significance, in the high preoperative KPS group (high KPS: 13.73 ± 3.38 months vs. low KPS: 5.20 ± 1.40 months; p = 0.010). Here, EGFR is linked to normal pressure hydrocephalus.