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Aim . To compare narrowband imaging (NBI) and autofluorescence imaging (AFI) endoscopic visualization for identifying superficial esophageal squamous cell carcinoma (SCC).  Methods . Twenty-four patients with superficial esophageal carcinomas diagnosed at previous hospitals were enrolled in this study. Lesions were initially detected using white-light endoscopy and then observed with both NBI and AFI. Endoscopic images documented each method, and three endoscopists experienced in esophageal imaging retrospectively reviewed respective images of histologically confirmed esophageal SCCs. Images were assessed for quality in identifying superficial SCCs and rated as excellent, fair, or poor by the three reviewers with interobserver agreement calculated using kappa (  κ  ) statistics.  Results . Thirty-one lesions histologically confirmed as superficial esophageal SCCs were detected in 24 patients. NBI images of 27 lesions (87%) were rated as excellent, three as fair, and one as poor compared to AFI images of 19 lesions (61%) rated as excellent, 10 as fair and two as poor ( P  < 0.05). Moderate interobserver agreement ( κ  = 0.42, 95% CI 0.24–0.60) resulted in NBI while fair agreement ( κ  = 0.35, 95% CI 0.18–0.51) was achieved using AFI.  Conclusion . NBI may be more effective than AFI for visualization of esophageal SCC.

diagnostic and therapeutic endoscopy

Comparison of Narrowband Imaging with Autofluorescence Imaging for Endoscopic Visualization of Superficial Squamous Cell Carcinoma Lesions of the Esophagus