Rigler's sign
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Cydebot
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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]]