No statistically significant differences in median age, gender ratio, median BMI, smoking status, types of EGFR mutations (exon 19 deletion, exon 20 insertion, and G719X), T790M mutation, eastern cooperative oncology group performance status (ECOG PS), and cerebral metastasis status among the patients with different types of ADRs were observed. The gene discussed is EGFR; the disease is cerebritis.