PMC4396719_01
(a) Rectosigmoid perforation under peritoneal reflection and free air in retroperitoneal space. (b) Para-aortic and pararenal free air.
CRIS2015-364576.001.jpg
PMC4396719_01_CRIS2015-364576.001.jpg
fig1
The patient then underwent urgent contrasted computed tomography of the abdomen and revealed large amount of air in the retroperitoneal space but no signs of peritoneal perforation were detected (Figures 1(a) and 1(b)).