We describe a series of colorectal polyps characterized by mixed adenomatous and
serrated features, herein referred to as superficially serrated adenomas. Twenty superficially
serrated adenomas were obtained from 11 female and 9 male patients aged 62–87 years.
Most lesions endoscopically appeared as small sessile polyps, but larger lesions were
plaque-like (2–20 mm; median, 5 mm). Eighteen lesions (90%) were located in the sigmoid
colon or rectum. They consisted primarily of straight, adenomatous glands but showed …