PMC5491808_01
The conventional endoscopy findings. Conventional colonoscopy showed a reddish depressed lesion that was classified as type 0-IIc according to the Paris classification (A). Chromoendoscopy revealed a slightly depressed area on the lesion without any invasive findings (B). Magnifying endoscopy with crystal violet staining showed an irregular arrangement of tubular and round pit patterns corresponding to Kudo's classification type VI (C).
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This time, a reddish lesion was detected at the ileum, 3 cm proximally from the ileocecal valve (ICV) (Fig. 1A). Chromoendoscopy revealed a slightly depressed area on the lesion without any invasive findings (Fig. 1B). Magnifying endoscopy with crystal violet staining showed an irregular arrangement of tubular and round pit patterns corresponding to Kudo's classification type VI (Fig. 1C).
The histopathological findings. The histological findings showed that the tumor was a well-differentiated adenocarcinoma 13x7 mm in size (A). A high-power view revealed a well-differentiated adenocarcinoma with no submucosal or lymphovascular invasion (B) (Hematoxylin and Eosin staining).
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The histological findings showed that the tumor was a well-differentiated adenocarcinoma of 13x7 mm in size with no submucosal or lymphovascular invasion (Fig. 2).
The conventional endoscopy findings at one year after ESD. Colonoscopy at one year after ESD revealed no local recurrence or stenosis.
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Colonoscopy and CT at one year after ESD revealed no local recurrence, stenosis, or lymph node metastasis (Fig. 3).