EGFR and lung adenocarcinoma: Following diagnosis, the patient received postoperative radiation therapy followed by osimertinib, and she remains recurrence-free three years after surgery. This case highlights an exceptionally rare pattern of recurrence, tumor-to-tumor metastasis of EGFR-mutated lung adenocarcinoma after right upper lobectomy into a meningioma, occurring 14 years after curative surgery.