Colon cancer with segmental defects in the intestinal muscularis propria without perforation or distention. Issue 9 (7th July 2021) - Takada, Kazunori; Hotta, Kinichi; Shimoda, Tadakazu; Aizawa, Daisuke; Imai, Kenichiro; Ito, Sayo; Kishida, Yoshihiro; Ono, Hiroyuki