Fig. 1.

CT features and endobronchial metastasis. Endobronchial metastasis in peripheral lung adenocarcinoma. CT scan showing lung cancer in the medial anterior basal segment of left lower lobe, with pleural retraction. Appearance obtained by bronchoscopy. Left lung lower lobe and upper lobe bronchial mucosal hyperemia, infiltration change, and luminal stenosis. Endoscopic biopsy pathology, adenocarcinoma; EGFR mutation, exon 19 deletion mutation