EGFR and leptomeningeal metastasis: A total of 10 (47.6%) patients had leptomeningeal metastases (LM), 11 (52.4%) had brain parenchymal metastases (BPM), 5 (23.8%) patients had EGFR mutation‐negative primary tumors at diagnosis, and 13 (61.9%) had positive tumors.