Rigler sign


Rigler sign: Radiographic sign of pneumoperitoneum. Air in the peritoneum and air within the intraluminal spaces outline the luminal and serosal surfaces of the bowel wall.

Rigler sign may be seen in up to 32% of patients with pneumoperitoneum demonstrated by supine abdominal radiographs


1941 – Rigler described the pneumoperitoneum sign and emphasized that it would only be observed when large quantities of free gas were present. [Radiology 1941; 37: 604–607]

Associated Persons

Alternative names

  • Rigler’s sign
  • Double Wall Sign


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the names behind the name

Emergency physician MA (Oxon) MBChB (Edin) FACEM FFSEM with a passion for rugby; medical history; medical education; and asynchronous learning #FOAMed evangelist. Co-founder and CTO of Life in the Fast lane | Eponyms | Books | Twitter |

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