Next‐generation sequencing assisted diagnosis of cervical metastasis in EGFR‐mutated lung adenocarcinoma: A case report

EGFR mutation has been detected in more than half of non‐small cell lung cancer (NSCLC) patients in Asia. Lung cancer is the main cause of malignant tumor‐related death worldwide. Although distant metastases often occurs in patients with advanced NSCLC, uterine cervical metastasis is rare. Here, we report a case of EGFR‐mutated lung adenocarcinoma with cervical metastasis. A 63‐year‐old female with known lung adenocarcinoma was found to have abnormal vaginal bleeding during osimertinib follow‐up visits. Immunohistochemical (IHC) staining and next‐generation sequencing (NGS) of the biopsy sample from the uterine cervical tumor confirmed metastatic dissemination from the primary lung malignancy. NGS assisted the diagnosis of uterine cervical metastasis from the primary lung. This is another major clinical application of NGS in addition to medication guidance and identification of drug resistance mechanisms.