Case Report
Copyright ©The Author(s) 2022.
World J Gastrointest Oncol. Jul 15, 2022; 14(7): 1348-1355
Published online Jul 15, 2022. doi: 10.4251/wjgo.v14.i7.1348
Figure 1
Figure 1 Abdominal computed tomography results. A: Plain scan showed a transverse colonic mass; B: Space-occupying lesion showed obvious enhancement.
Figure 2
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
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
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.