Endoscopic phenotype of four representative sessile serrated polyps/adenomas (SSA/Ps) located in the ascending colon of patients with the serrated polyposis syndrome.

Panel A. Large 15 mm diameter SSA/P with a mucus cap. Panel B. 20 mm diameter SSA/P. Panel C. 10 mm diameter SSA/P. Panel D. Small 4 mm diameter SSA/P. The size of polyps was estimated using biopsy forceps as a reference. Histopathology analyses were consistent with SSA/Ps (M. Bronner).