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Closed loop obstruction occurs when a segment of bowel is incarcerated at two contiguous points. The diagnosis is based on multiple transitional zones. The incarcerated loops appear in U or C form or present a radial layout around the location of the obstruction. It's very important to specify the type of obstruction because, in patients with simple bowel obstruction, a conservative approach is often advised. On the other hand, a closed loop obstruction immediately requires a surgical approach because of its high morbidity and the risk of death in case of a late diagnosis., (Copyright © 2013 Éditions françaises de radiologie. Published by Elsevier Masson SAS. All rights reserved.)

A case of agenesis of the right lobe of the liver associated with portal hypertension is reported. This uncommon feature was diagnosed by computed tomography which excluded secondary liver atrophy due to cirrhosis or tumour. The main pathophysiological hypothesis for agenesis and portal hypertension, exceptionally associated, is arrest of hepatic development during foetal life.