Rare squamous cell carcinoma of the jejunum causing perforated peritonitis: A case report

Figure 1 Abdominal computed tomography images. A: Uneven thickening of the small intestinal wall with viscus perforation (arrow); B: Free gas outside the intestine but in the abdomen (arrows); C: The liver parenchyma had multiple round low-density nodules of varying sizes (arrows).

Figure 2 Pathological and immunohistochemical findings. A and B: Pathological findings from surgical specimen. The lesion showed a serosal penetration (A), with diffuse and nested growth of tumor cells and intracellular dyskeratosis being visible (B); C and D: Immunochemistry demonstrated that the staining for cytokeratin-5/6 and antioncogene P40 was strongly positive.

Figure 3 Exploratory laparotomy results. A: The perforation of a jejunal segment with a purulent surface was noted; B: The enteric cavity showed a deep ulcer lesion.