Fig. 1A.6-year-old girl with abscess after surgery. Axial CT scan
through pelvis shows deep pelvic abscess (long arrow). Safe
percutaneous access is precluded anteriorly by bladder (solid short
arrow) and colon (solid curved arrow) and laterally by iliac
vessels (curved open arrow) and bone (short open arrow).
Fig. 1B.6-year-old girl with abscess after surgery. CT scan shows
catheter was placed (long arrow) via greater sciatic foramen. Sciatic
nerve is not seen but courses along lateral aspect of foramen (short
arrow).
Fig. 2A.7-year-old girl with appendicitis and abscess. Axial CT scan
through pelvis shows anterior and lateral approaches to abscess (long
arrow) are precluded by bladder (short arrow) and bowel
(curved open arrow). Guiding needle was advanced via transgluteal
approach (curved solid arrow).