Fig. 6.

a Histological proven, endoscopically resected T1 rectal adenocarcinoma (red arrows). b Early rectal adenocarcinoma (uT1) limited to the submucosa, visualized by endorectal strain elastography as a hard (low strain) mass at 12 to 1 o’clock (courtesy of Eike Burmester, Frank Pfeffer).