(a) A component of the sessile serrated adenoma/polyp (SSA/P) remained at the periphery of the invasive cancer (yellow line in Figure 3
, ×12.5). The green box indicated a component of the SSA/P without cytological dysplasia. (b) A magnified view of a yellow box in (a). Histologically, a transition from the SSA/P with cytological dysplasia to a moderately differentiated adenocarcinoma was identified (×200).