Table 2.

Summary of the Six Patients with Newly Diagnosed Colonic Adenocarcinoma at Follow-up Colonoscopy

No	Age/sex	Risk group	Withdrawal time, min	Interval, mo*	Adenocarcinoma location, size, type in follow-up colonoscopy	TNM stage	Treatment
1	68/M	Low	8	23.9	Ascending colon, 1.2 cm, LST NG type	pT1N0M0 Adenocarcinoma, well differentiated	(Laparoscopic) Right hemicolectomy
2	58/M	Low	8	12.0	Ascending colon, 2.5 cm, LST NG type	pTis Adenocarcinoma, well differentiated	Endoscopic submucosal dissection
3	60/M	Low	13	35.7	Sigmoid colon, 2.5 cm, ulcerofungating	pT3N1M0 Adenocarcinoma, moderately differentiated	(Laparoscopic) Low anterior resection
4	73/M	High†	14	29.7	Transverse colon, 1.0 cm, LST NG type	pTis Adenocarcinoma, well differentiated	Endoscopic submucosal dissection
5	57/M	High	15	68.8	Ascending colon, 3.0 cm, ulcero-infiltrative	pT3N2aM1 Mucinous adenocarcinoma	Extended right hemicolectomy Right adrenalectomy
6	70/M	Normal	<6	54.2	Transverse colon, 1.0 cm, ulcerative	pT1N0M0 Adenocarcinoma, well differentiated	(Laparoscopic) Transverse colectomy

TNM stage, depth of invasion: submucosa (pT1), subserosa (pT3), adenocarcinoma in situ (pTis).

M, male; LST NG, laterally spreading tumor, nongranular.

^*Months between the index screening colonoscopy and follow-up colonoscopy at which cancer was detected;

^†Polypectomy in the index colonoscopy with pathology-proven complete resection of the adenoma.