Fig. 4From: Superiority of NBI endoscopy to PET/CT scan in detecting esophageal cancer among head and neck cancer patients: a retrospective cohort analysisPET/CT scan and NBI endoscopy’s ROC curves on diagnosing superficial esophageal lesions (Tis and T1) The AUC of NBI endoscopy is significantly larger than that of PET/CT scan (p < 0.001)Back to article page