PMC10357062_01
Preoperative CT scan of the abdomen and pelvis with a narrow segment of the jejunum ( ).
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Otherwise, normal findings of the abdominal and pelvic organs (Figure 1) are shown.
Longitudinal sections of the small bowel contrasting normal small intestine (right) and abnormal stricture area of small intestine with mucosal attenuation, muscular wall thickening, fine adipose tissue fibrosis, and fine serosal exudate.
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Pathological examination of the tissue (Figure 2) showed extensive serosal, mesenteric, and extrinsic small bowel involvement by invasive, poorly differentiated carcinoma with small bowel structure.
Cytokeratin 7 immunohistochemical stain highlighting the diffusely infiltrative carcinoma in the submucosa, muscular wall, mesenteric adipose tissue, and serosal surface.
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Cytokeratin 7 immunohistochemistry stain showed diffusely infiltrative carcinoma in the submucosa, muscular wall, mesenteric adipose tissue, and serosal surface pattern compatible with the patient's history of UBC (Figure 3).