A 66-year-old man underwent colonoscopy for the purpose of examining bloody stools, accidentally revealed a reddish 0-Isp polyp of 15 mm in diameter in the terminal ileum. On narrow-band imaging (NBI) magnified observation, the vessel pattern was uniform and regular, and the surface pattern was well-ordered, which indicated a type 2A colorectal lesion according to the classification of the Japan NBI Expert Team (JNET). EMR was performed. The pathological diagnosis was high-grade tubular adenoma, and the resection margin was negative.
The JNET classification was useful in this case. The endoscopic diagnostic method in the colorectum may also be used in the small intestine. And keeping in mind small intestine tumor may contribute to improvement of prognosis by early detection and endoscopic treatment.
