case_images: PMC5516762_01
case_images: Coronal CT scan of the abdomen and pelvis showing a pseudokidney mass (arrow).
case_images: CRIS2017-3675848.001.jpg
case_images: PMC5516762_01_CRIS2017-3675848.001.jpg
case_images: fig1
case_images: Computerized tomography of the abdomen demonstrated a thickening of small bowel loops with a pseudokidney pattern, suggestive of intussusception (Figure 1).
case_images: Macroscopic appearance of the resected specimen, showing a 3 cm pedunculated polyp.
case_images: CRIS2017-3675848.002.jpg
case_images: PMC5516762_01_CRIS2017-3675848.002.jpg
case_images: fig2
case_images: 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).
case_images: Hematoxylin and eosin (H&E) stain demonstrating a mucosal and submucosal spindle cell proliferation showing an "onion-skin" disposition around the abundant blood vessels.
case_images: CRIS2017-3675848.003.jpg
case_images: PMC5516762_01_CRIS2017-3675848.003.jpg
case_images: fig3
case_images: 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).
case_images: H&E stain demonstrating an associated abundant inflammatory infiltrate dominated by eosinophils.
case_images: CRIS2017-3675848.004.jpg
case_images: PMC5516762_01_CRIS2017-3675848.004.jpg
case_images: fig4
case_images: There was an associated abundant inflammatory infiltrate comprising mainly eosinophils (Figure 4).
case_images: CD34 immunostaining showing diffuse positivity in the spindle cells.
case_images: CRIS2017-3675848.005.jpg
case_images: PMC5516762_01_CRIS2017-3675848.005.jpg
case_images: fig5
case_images: On immunohistochemical studies, the spindle cells were diffusely positive for CD34 (Figure 5) and negative for CD117.