PMC9632977_01
Arterial phase of abdominal contrast-enhanced computed tomography showed jejunal intussusception of the left-sided upper abdomen with concentric circle-like changes. (A) The intestinal canal of the upstream small intestine was dilated, and the outer intestinal wall was edematous and thickened (arrows); (B) there was the presence of the blood vessels and part of the mesenteric fat within a loop of jejunum which suggested intussusception with the jejunal lesion (arrow).
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F1
There was the presence of fat within a loop of the jejunum which suggested intussusception with a jejunal lesion and a small amount of pelvic fluid (Figure 1).
Magnetic resonance imaging (MRI) demonstrated jejunal intussusception of the left-sided upper abdomen with concentric circle-like changes. (A) T1 FS (arrow); (B) RTr OAx T2 fs (arrow); (C) WATER: Ax LAVA-Flex (arrow); (D) InPhase: Ax LAVA-Flex (arrow); (E) BH Cor 2D Fiesta Shim showed the intussusception of the long segment of jejunum from the pelvis to the left-sided upper abdomen, with concentric circle-like changes about 14.2 cm (arrows); (F) BH Cor 2D Fiesta Shim showed the thickening of the proximal jejunum intestinal wall with the thickest part about 2.6 cm, and the lumen was narrowed with peripheral exudation (arrow). The distal segment of the jejunum and ileum were dilated, with fluid accumulation and slightly thickened walls (circle).
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F2
Magnetic Resonance Imaging (MRI) demonstrated thickening of the proximal jejunum intestinal wall (Figure 2). 18F-FDG positron emission tomography/computed tomography (18F-FDG PET/CT) showed that the distal intestinal metabolic activity increased unevenly, and multiple small lymph nodes were found around the intestine without abnormal metabolic activity (Figure 3).
(A-C) 18F-FDG positron emission tomography/computed tomography showed that the distal intestinal metabolic activity increased unevenly; (D,E) multiple small lymph nodes were around the intestine without abnormal metabolic activity.
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F3
Magnetic Resonance Imaging (MRI) demonstrated thickening of the proximal jejunum intestinal wall (Figure 2). 18F-FDG positron emission tomography/computed tomography (18F-FDG PET/CT) showed that the distal intestinal metabolic activity increased unevenly, and multiple small lymph nodes were found around the intestine without abnormal metabolic activity (Figure 3).
Microscopic features of the resected tumor. (A) morphology showed cysts in mucosal lamina propria and submucosa (hematoxylin-eosin staining, x40); (B) mucosal lamina propria and submucosa of the jejunum (hematoxylin-eosin staining, x20); (C,D) the endothelial cells were partially positive for D2-40 (C) and CD31 (D) (x40).
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F4
The endothelial cells were partially positive for D2-40, CD31, CD34 (Figure 4), desmin, and elastin in immunohistochemical staining.