Rigler's sign 3413386 123621537 2007-04-17T20:17:52Z Cydebot 1215485 Robot - Removing category Eponymous medical signs per [[WP:CFD|CFD]] at [[Wikipedia:Categories for discussion/Log/2007 Month 0]]. '''Rigler's sign''', also known as the '''double wall sign''', is seen on an [[x-ray]] of the [[abdomen]] when air is present on both sides of the [[intestine]]; a Rigler's sign is present when air is present on the inside (lumenal side) and the outside (peritoneal side). Air in the [[peritoneum]] is considered abnormal, unless the patient had a recent [[abdominal surgery]]. A false double wall sign can result from two loops of bowel being in contact with one another.<ref>de Lacey G, Bloomberg T, Wignall BK. Pneumoperitoneum: the misleading double wall sign. Clin Radiol. 1977 Jul;28(4):445-8. PMID 872511.</ref> ==See also== *[[Football sign]] - another sign of [[pneumoperitoneum]]. ==References== <references/> ==Sources== *Harkin DW, Blake G. Small bowel obstruction in a young adult. Postgrad Med J. 1999 Mar;75(881):173-5. PMID 10448501. [http://pmj.bmjjournals.com/cgi/content/full/75/881/173 Free Full Text]. ==External links== *[http://www.learningradiology.com/notes/ginotes/freeairpage.htm A film of Rigler's sign] and the [[Football sign]] - learningradiology.com [[Category:Gastroenterology]] [[Category:Radiology]] [[Category:Radiologic signs]]