case_images: PMC8449722_01
case_images: (a) The preoperative CT scan shows a stricture of the sigmoid colon. (b) A resection of the sigmoid colon was performed and the segment sent for histological analysis.
case_images: CRIPA2021-7237379.001.jpg
case_images: PMC8449722_01_CRIPA2021-7237379.001.jpg
case_images: fig1
case_images: Resection of the rectosigmoid colon with colorectal anastomosis was performed (Figures 1(a) and 1(b)).
case_images: (a) All four tumors from the resected colon segment were composed of solid sheets of spindle and epithelioid neoplastic cells (H&E, 100x magnification). (b) At higher magnification, prominent nucleoli and mitotic figures are visible (H&E, 400x magnification). (c) The tumor cells showed strong positive immunohistochemical staining with the endothelial marker CD31 (200x magnification). (d) Staining for ERG confirmed the tumors' endothelial origin (200x magnification).
case_images: CRIPA2021-7237379.002.jpg
case_images: PMC8449722_01_CRIPA2021-7237379.002.jpg
case_images: fig2
case_images: TTF-1, PAN-CK, ALK, Mpox, S-100, and DOG1 (Figures 2(a)-2(d)).
case_images: A CT scan following the surgery showed multiple residual tumors in the lower abdomen and pelvis. (a) Front abdominal wall. (b) Psoas muscle. (c) Gluteus. (d) Iliac bone.
case_images: CRIPA2021-7237379.003.jpg
case_images: PMC8449722_01_CRIPA2021-7237379.003.jpg
case_images: fig3
case_images: A CT scan showed multiple residual tumors in the lower abdomen and pelvis measuring up to 6.5 cm in the greatest diameter, with signs of massive hemorrhage within them (Figures 3(a)-3(d)).