Pediatric case of colonic perivascular epithelioid cell tumor complicated with intussusception and anal incarceration: A case report

Figure 1 Abdominal computed tomography results. A: Plain scan showed a transverse colonic mass; B: Space-occupying lesion showed obvious enhancement.

Figure 2 Colonoscopy results. A: The tumor is spherical, with a diameter of about 5 cm, a surface that is congested and eroded, and with formation of local ulcers; B The root of the tumor has a thick pedicle, with rough surface mucosa and covered with leukoplakia; C: Narrow band imaging showed that the glandular ducts had disappeared and the presence of vasodilation.

Figure 3 Tumor. A: The tumor was outside the anus; B: The tumor was removed surgically, in addition to about 3 cm of the affected bowel.

Figure 4 Pathology and immunohistochemistry results. A: 40 × magnification showing that the tumor was located in the intestinal wall, and the tumor cells were arranged in nests or acini; B: 100 × magnification showing that the tumor cells were transparent or eosinophilic granular; C: 200 × magnification showing abundant capillaries in the interstitium; D: Human melanoma black 45 (+) detected by the EnVision method.