VolvulusCreated OnMay 3, 2020Last Updated OnMay 3, 2020byadmin You are here: Main Radiology Volvulus < All Topics Table of Contents Sigmoid Volvulus More prone to twisting than other segments of the large bowel because it is ‘mobile’ on its own mesentery, which arises from a fixed point in the left iliac fossa The sigmoid colon is very dilated because it is twisted at the root of its mesentery in the left iliac fossa (LIF). The proximal large bowel is also dilated (asterisks) The twisted loop of sigmoid colon is said to resemble a coffee bean. As in this case the loop of dilated sigmoid colon – or ‘coffee bean’ – usually points upwards towards the diaphragm Caecal Volvulus The caecum is most frequently a retroperitoneal structure, and therefore not susceptible to twisting. However, in up to 20% of individuals there is congenital incomplete peritoneal covering of the caecum with formation of a ‘mobile’ caecum on a mesentery The massively dilated caecum no longer lies in the right iliac fossa (RIF). Rather this is occupied by small bowel (outline). The small bowel is identified by the valvulae conniventes – mucosal folds that cross the full width of the bowel (arrowheads). *Some of the image photo is taken from web, we do not own this, it’s for knowledge sharing purpose.

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