case_images: PMC1182401_01
case_images: Imaging of the large bowel 1a) CT scan showing the large lesion in the posterior and left lateral wall of the rectum and 1b) MRI imaging: the distal rectal wall lesion (GANT) is shown to be intramural and free from adjoining structures.
case_images: 1477-7819-3-46-1.jpg
case_images: PMC1182401_01_1477-7819-3-46-1.jpg
case_images: F1
case_images: Tissue plane between this lesion and prostate was not clearly seen but there was no infiltration of the ischiorectal fat (Figure 1a). Magnetic resonance imaging (MRI) showed a very large well-defined mass in the left presacral / ischio-anal fossa contiguous with rectal wall and thus almost certainly arising from one of the elements of the rectal wall (Figure 1b).
case_images: Barium enema a) the apple core lesion at the splenic flexure and b) the extrinsic compression in the distal rectum caused by schwannoma.
case_images: 1477-7819-3-46-2.jpg
case_images: PMC1182401_01_1477-7819-3-46-2.jpg
case_images: F2
case_images: Barium enema showed an apple core lesion in the splenic flexure (Figure 2a) as well as narrowing of the distal rectal lumen (Figure 2b).
case_images: Resected specimen showing malignant tumour at the splenic flexure, polyp in the descending colon and rectal schwannoma.
case_images: 1477-7819-3-46-3.jpg
case_images: PMC1182401_01_1477-7819-3-46-3.jpg
case_images: F3
case_images: Macroscopic examination of the resected specimen confirmed the malignant tumour in the splenic flexure, the polyp in the descending colon and a 10 x 12 cm tumour with a well-defined pseudocapsule in the postero-lateral wall of the mid and low rectum (Figure 3).
case_images: Photomicrograph showing a) cellular (Antoni A) and b) myxoid (Antoni B) areas (hematoxylin and eosin x40).
case_images: 1477-7819-3-46-4.jpg
case_images: PMC1182401_01_1477-7819-3-46-4.jpg
case_images: F4
case_images: Some parts of the tumour were quite cellular while few areas were hypocellular reminiscent of the Antoni A and Antoni B patterns respectively (Figures 4a and 4b).
case_images: Immunohistochemical staining of the rectal lesion with a) CD34, b) S100, c) Vimentin and d) NSE (original magnification x40).
case_images: 1477-7819-3-46-5.jpg
case_images: PMC1182401_01_1477-7819-3-46-5.jpg
case_images: F5
case_images: S100 (Figures 5a, 5b, 5c and 5d). Smooth muscle markers actin and desmin were negative.