Lower gastrointestinal bleeding attributed to xanthogranulomatous appendicitis: A case report

Figure 1 Emergency colonoscopy image. Colonoscopy revealed dark red blood throughout the intestinal lumen, with visible fresh red bleeding emanating from the appendiceal lumen.

Figure 2 Contrast-enhanced computed tomography of the appendix. A and B: Computed tomography demonstrated mild luminal dilation, localized wall thickening, and contrast enhancement on dynamic imaging; gas was present within the appendiceal lumen, and the surrounding fat spaces were clear.

Figure 3 Gross specimen after appendectomy.

Figure 4 Postoperative pathology. A-C: Histopathological analysis and haematoxylin and eosin staining. Postoperative pathology suggested vascular dilatation with congestion and bruising, accompanied by ferritin deposition and a peripheral multinucleated giant-cell reaction, as well as mucosal ulceration and hemorrhage, consistent with xanthogranulomatous appendicitis (hematoxylin-eosin staining, 40 ×).