case_images: PMC11196823_01
case_images: A colonoscopy performed at the local hospital reveals that a pedicled polyp with a rough surface and hyperemia was seen in the ileocecal region (the white arrows refer to the pedicled polyp).
case_images: fonc-14-1395144-g001.jpg
case_images: PMC11196823_01_fonc-14-1395144-g001.jpg
case_images: f1
case_images: A colonoscopy ( Figure 1 ) performed at the local hospital revealed a pedicled polyp about 5 cm x 5 cm in size with a rough surface and hyperemia was seen in the ileocecal region (biopsy).
case_images: Results of the colonoscopy show a section of the terminal ileum with congestion and edema on the surface collapsing into the ascending colon (the white arrows refer to the terminal ileum collapsing into the ascending colon).
case_images: fonc-14-1395144-g002.jpg
case_images: PMC11196823_01_fonc-14-1395144-g002.jpg
case_images: f2
case_images: A colonoscopy ( Figure 2 ) was performed in our hospital for polypectomy, but it revealed a section of the small intestine with congestion and edema on the surface was embedded in the ascending colon.
case_images: Enhanced computed tomography cross-section images show the terminal ileum collapsing into the ascending colon's lumen: (A) with the typical "concentric circles" appearance (white arrows); (B) with the typical "sausage-like" sign appearance (white arrows); (C) with enlarged lymph nodes in the mesenteric region (white arrows); and (D) with a small amount of fluid in the pelvic cavity (white arrows).
case_images: fonc-14-1395144-g003.jpg
case_images: PMC11196823_01_fonc-14-1395144-g003.jpg
case_images: f3
case_images: The abdominal contrast-enhanced CT scan ( Figure 3 ) showed that the wall of the ileocecal region was blurred, and the mesentery and end of the ileum were collapsed into the ascending colon's lumen, presenting "sausage-like" signs and "concentric circles" along with a few oozing shadows and small lymph nodes surrounding it.
case_images: Postoperative pathology: (A) small bowel with a dense and diffuse lymphocytic infiltrate (HE, x100); (B) atypical cells are diffusely positive for the marker CD20 (IHE CD20, x100); (C) atypical cells are diffusely positive for the marker CD79a (IHE CD79a, x100); (D) small bowel with a dense and diffuse lymphocytic infiltrate (HE, x400); (E) atypical cells are diffusely positive for the marker CD20 (IHE CD20, x400); (F) atypical cells are diffusely positive for the marker CD79a (IHE CD79a, x400); (G) atypical cells are diffusely positive for the marker BCL-2 (IHE BCL-2, x100); (H) atypical cells are diffusely positive for the marker BCL-6 (IHE BCL-6, x100); (I) Ki-67 hot spots at about 40% (+) (IHE Ki-67, x100); (J) atypical cells are diffusely positive for the marker BCL-2 (IHE BCL-2, x400); (K) atypical cells are diffusely positive for the marker BCL-6 (IHE BCL-6, x400); and (L) Ki-67 hot spots at about 40% (+) (IHE Ki-67, x400).
case_images: fonc-14-1395144-g004.jpg
case_images: PMC11196823_01_fonc-14-1395144-g004.jpg
case_images: f4
case_images: Postoperative pathology ( Figure 4 ) showed the right hemicolon resection specimen: B-cell lymphoma of the terminal ileum.