Figure 3. Normal CT appearance of the polypropylene (PP) and expanded polytetrafluorethylene (e-PTFE) meshes. (a) CT scan of the same patient showed on Figure 2a. The PP mesh (long arrow) appears as a line with a similar density to the adjacent muscles. (b) Same patient of Figure 2b: the e-PTFE mesh (thick arrow) appears on CT as a hyperdense line behind the abdominal wall muscles.