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Abdominal supine X-ray showed dilatation of large bowel segments.
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Abdominal supine X-ray showed dilatation of large bowel segments (Fig. 1).
Colonoscopy showed a red, intraluminal mass in the upper rectum.
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A contrast-enhanced abdominal computed tomography scan revealed a swelling of the rectal wall and colonic dilatation, and colonoscopy showed an intraluminal mass of redness in the upper rectum, which was peculiarly shaped (Fig. 2) and the scope could not pass through the mass.
(a) Macroscopically, the rectum was filled with an intraluminal mass (arrow). (b) The resected specimen after fixation in formalin.
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The rectum was filled with an intraluminal mass measuring 5 cm x 4 cm (Fig. 3a and b), specimens of which demonstrated near complete luminal obstruction at the site of the mass and extraluminal fibrotic adhesion (Fig. 4).
Microscopic examination of the tumor with hematoxylin and eosin staining (x100) revealed that the rectal muscularis propia included endometrial glands and stroma.
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Microscopic examination revealed that the rectal muscularis propia and submucosa included endometrial glands and stroma, and a diagnosis of rectal endometriosis was made in the absence of malignancy (Fig. 5).