Fig. 3

Macroscopic and pathological findings of the resected specimens. a Macroscopic findings of the band. b Microscopic examination revealed that the band consisted of blood vessels. c Macroscopic findings of the appendix. The appendiceal wall was slightly thickened, and fecal stones were found on the proximal side of the appendix. d Microscopic examination revealed diffuse infiltration of lymphocytes and eosinophils throughout the muscularis propria