Fig. 1From: Non-perforation tension pneumoperitoneum resulting from primary non-aerobic bacterial peritonitis in a previously healthy middle-aged man: a case reportErect plain abdominal X-ray on admission confirming tension pneumoperitoneum. Large amount of free gas under the right dome of the diaphragm, enveloping the liver (white arrow). The liver is diminished in size and has shifted downwards and medially, resembling a collapsed lung in pneumothorax: “the saddlebag sign” (yellow arrow). Liquid level in the free peritoneal cavity (blue arrow). High position of the right dome of the diaphragm (red arrow). Nasogastric tube (green arrow)Back to article page