Magnifying colonoscopy as a non-biopsy technique for differential diagnosis of non-neoplastic and neoplastic lesions

Figure 1 A: Colonoscopy revealed a small reddish polypoid lesion 3 mm in diameter. B: Chromoendoscopy with magnification disclosed a type II pit, and the lesion was diagnosed as non-neoplastic and examined at biopsy. The histologic diagnosis was hyperplastic polyp.

Figure 2 A: Colonoscopy revealed a small flat lesion 5 mm in diameter. B: Chromoendoscopy with magnification disclosed a type IIIL pit, and the lesion was diagnosed as neoplastic and resected by snare polypectomy. The histologic diagnosis was adenoma with moderate atypia.