"post-stenotic dilatation or evidence of collateral formation"
"Additional features that may be appreciated include post-stenotic dilatation, prominent collaterals, such as the gastroduodenal and common hepatic arteries 3, and thickening of the median arcuate ligament. A thickness of the median arcuate ligament of greater than 4 mm is considered abnormal 4."
"The clinical entity was described in 1963 by P T Harjola, a Finnish surgeon who performed the first median arcuate ligament release 9. A larger case series of 15 patients was published in the American Journal of Roentgenology in 1965 by the radiologist J David Dunbar and surgeon Samuel Marable, both from Ohio, USA 10."
"There is considerable variation in positioning of both the coeliac trunk and the diaphragm 1. In some, the ligament is positioned more inferiorly relative to the coeliac artery, resulting in compression. The degree of compression typically varies with respiration, most accentuated during end-expiration when the two structures move closer together."
"History and etymology"