Abstract
Free air within the peritoneal cavity can be recognized on supine abdominal films by identification of the median subphrenic space. We have termed this the “cupola sign.” In a review of 100 patients with pneumoperitoneum, this sign was seen in 6 patients. In 3 instances it was the only manifestation of a pneumoperitoneum and in 3 instances it was seen in association with air below the right and left diaphragmatic leaves.
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Mindelzun, R.E., McCort, J.J. The cupola sign of pneumoperitoneum in the supine patient. Gastrointest Radiol 11, 283–285 (1986). https://doi.org/10.1007/BF02035091
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DOI: https://doi.org/10.1007/BF02035091