Table 1.

Clinical feature of the patients.

Case	Indication	Age (yr)	Sex	Approach route	Endoscopic findings	Histological findings	Intervention
1	bowel obstruction	48	M	oral	narrowing anastomosis with normal mucosa1	NA
2	bowel obstruction	40	F	oral	edematous change of the lumen2	non specific inflammation	dilation
3	low protein	28	F	anal	annular constriction3	non specific inflammation
4	bowel obstruction	41	M	oral	narrowing lumen with normal mucosa4	NA
5	abdominal tumor	65	M	anal	tumor	lymphoma
6	bowel obstruction	56	M	anal	multiple strictures	non specific inflammation
7	bowel obstruction	47	M	oral	narrowing lumen with normal mucosa4	no remarkable change
8	bowel obstruction	29	M	oral	mild inflammatory change5	NA
9	bowel obstruction	50	F	anal	tumor	inflammatory fibroid polyp
10	anemia	68	F	anal	multiple strictures3	non specific inflammation
11	hematochezia	41	F	both	multiple strictures with ulceration3	non specific inflammation
12	bowel obstruction	47	F	oral	longitudinal ulcerations5	NA	dilation
13	bowel obstruction	62	M	oral	narrowing anastomosis with normal mucosa1	NA
14	abdominal tumor	52	M	both	tumor	undifferentiated cancer
15	bowel obstruction	23	F	anal	narrowing lumen with normal mucosa4	NA
16	bowel obstruction	27	F	oral	edematous change of the lumen5	NA	dilation
17	bowel obstruction	42	M	anal	course and red-colored lumen with ulceration6	non specific inflammation	dilation

NA: not assessed.

¹Postoperative stricture was suspected.

²Lung sarcoidosis was found in this patient.

³Intestinal tuberculosis was suspected based on the feature of stricture or ulceration and other clinical features.

⁴Intestinal adhesion was suspected.

⁵Crohn's disease was suspected based on the feature of strictures or ulcerations along with other clinical features.

⁶Posttraumatic stricture was suspected.