PMC7154945_01
Computed tomography findings.. A 12-cm cystic dilatation is observed in the small intestine, and pooled residues are seen inside the abdominal cavity (yellow arrows). Free air is found in the abdominal cavity (red arrows).
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Computed tomography (CT) showed free air in the abdominal cavity, a 12-cm cystic dilatation in the small intestine, and pooled residues inside the abdomen (Fig. 1).
Intraoperative and postoperative findings.. (a) Intraoperative photograph showing a large tumour (measuring 10 cm) with extraluminal growth arising from the jejunum. The tumour was ligated 30 cm from the Treitz ligament, and there was a large hematoma inside. Perforation was recognised at the neck of the same site.. (b) Postoperative photograph showing the excised specimen. The tumour is 7.0 x 6.5 cm in size and is comprised mostly of cystic lesions containing blood. It shows extraluminal development on the mesenteric side, and the tumour penetrates the mucosal surface.
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There was a large hematoma within the mass, and perforation was recognised at the neck of the diverticulum (Fig. 2a). It showed that the mass had developed on the antimesenteric side of the jejunum, and it connected with the lumen of the jejunum (Fig. 2b).
Immunochemistry findings.. (a) Haematoxylin and eosin staining showing proliferation of spindle-shaped cells.. (b) and (c) Immunohistochemistry reveals that the tumour is positive for KIT (b) and CD34 (c).
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Haematoxylin and eosin staining showed proliferation of spindle-shaped cells, and immunohistochemical staining revealed that the tumour was positive for KIT and CD34, with approximately 4.0% of the tumour cells positive for nuclear expression of the proliferation-associated antigen Ki-67 (Fig. 3).