Fig. 2From: Analysis of white-light imaging-based features predictive for determination of lesion depths of superficial flat esophageal squamous cell carcinoma: a retrospective multicenter study from ChinaTypical WLI-based endoscopic appearance of granularity and nodularity of SESCC. WLI: white-light imaging; SESCC: superficial esophageal squamous cell carcinoma. A protrusion in size of < 5 mm or ≥ 5 mm was defined as granularity (A) and nodularity (B), respectively. Also, granular and nodular protrusions were shown by black arrowsBack to article page