PMC6360016_01
Computerized tomography (CT) of the lower abdomen demonstrated an intra-abdominal abscess sized 9x4 cm demonstrated by arrows (A: Sagittal view, B: Axial view)
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F1
Contrast tomography of the lower abdomen demonstrated an intra-abdominal abscess sized 9x4 cm, located on the right lateral side of the rectum with extensions to the right inguinal tract and containing air spaces (Figure 1).
Axial computed tomography (CT) image demonstrating the horseshoe abscess located at the posterior rectal area
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F2
An abscess that contained air spaces was detected, measuring 13 mm at the greatest width in the ischiorectal region, showing marked internal wall staining extending towards the posterior of the rectum but the borders could not be clearly defined because of metal artefact associated with the left hip prosthesis (Figure 2).