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Abdominal CT scan of the patient showing a space-occupying lesion in the distal descending colon.
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A computed tomography of the abdomen and pelvis demonstrated a 13 x 10 x 10 mm3 ovoid lesion in the distal descending colon and no evidence obstruction and associated regional lymphadenopathy (Fig. 1).
Colonoscopic finding showing a smooth distal descending colon tumour.
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A colonoscopy performed confirmed the ovoid mass, for which an inverted diverticulum was initially suspected (Fig. 2).
Gross picture of the high anterior resection specimen showing the descending colon lymphangioma.
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The intussuscepting mass was completely excised with clear margins (Fig. 3).
Haematoxylin and eosin stained section ((a) low power magnification, (b) high power magnification) showing a unilocular cyst in the submucosa lined by lymphatic endothelium with a thin fibrous wall containing occasional bundles of smooth muscle. Some smaller adjacent lymphatic channels are noted at high power.
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No evidence of diverticulosis was identified (Fig. 4).