Answers are grounded in this paper and cite their sources.
Two flat adenomas and a flat mucosal carcinoma of the colon were reported in patients with synchronous and metachronous colonic carcinomas. These lesions were almost flat and were not detected by preoperative endoscopic examinations. Colonoscopists should be aware of the presence of flat adenomas, which can be easily missed, and recognize them as lesions that play an important role in the "adenoma-carcinoma sequence."
No takes yet. Share an insight, caveat, or question.
Adachi et al. (1988) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: