Fig. 17

Perihepatic abscess diagnosed 10 days after endoscopic stent positioning through a cytologically benign distal CBD stricture in a 78-year-old female. Contrast-enhanced CT (a) requested because of fever and right hypochondrium pain revealed a fluid-like collection (*) with an enhancing peripheral rim and minimal extraluminal air (+) predominantly in the right-sided retroperitoneum. Urgent surgery included cholecystectomy and abscess drainage. Postoperatively, unenhanced T2-weighted MRI (b) depicted resolution of the abscess (arrowheads)