PMC5516762_01
Coronal CT scan of the abdomen and pelvis showing a pseudokidney mass (arrow).
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Computerized tomography of the abdomen demonstrated a thickening of small bowel loops with a pseudokidney pattern, suggestive of intussusception (Figure 1).
Macroscopic appearance of the resected specimen, showing a 3 cm pedunculated polyp.
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Macroscopic examination of the resected ileal segment found a 3 x 3 x 3 cm firm pedunculated polyp projecting into the bowel lumen (Figure 2).
Hematoxylin and eosin (H&E) stain demonstrating a mucosal and submucosal spindle cell proliferation showing an "onion-skin" disposition around the abundant blood vessels.
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Microscopic examination revealed a mucosal and submucosal proliferation of loose spindle cells arranged in short fascicles or whorled structures, often in an "onion-skin" disposition around the abundant blood vessels (Figure 3).
H&E stain demonstrating an associated abundant inflammatory infiltrate dominated by eosinophils.
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There was an associated abundant inflammatory infiltrate comprising mainly eosinophils (Figure 4).
CD34 immunostaining showing diffuse positivity in the spindle cells.
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On immunohistochemical studies, the spindle cells were diffusely positive for CD34 (Figure 5) and negative for CD117.