Fig. 2

a The pathological findings revealed chronic inflammation in the intestinal mucosa, along with interstitial hyperemia and edema. Hemorrhage was observed in the muscle layer and serosal layer of the intestinal wall, accompanied by significant infiltration of inflammatory cells. Ulcer formation was also observed in the peripheral intestinal wall (HE, 4 × 10 times). b Increased vascular wall thickness, hyalinosis, and infiltration of inflammatory cells were seen, along with polyposis at the site of vascular inflammation. Additionally, there was an overflow of red blood cells from the blood vessels (HE, 10 × 10 times)