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Clinicopathological characteristics of colorectal cancer less than 10 mm in diameter and invading submucosa and below

Background and Aims:  Identifying the invasive depth of cancers less than 10 mm in diameter remains a challenge. This study examines the clinicopathological characteristics of colorectal cancers less than 10 mm in diameter and invading submucosal layer (SM)3 and below, which require surgery and must never be treated by endoscopic mucosal resection.