Fig. 12
The most common appearance of post-cholecystectomy bleeding. a, b Forty-eight hours after open cholecystectomy converted from laparoscopic cholecystectomy, CT showed perihepatic blood (*) isoattenuating with the liver on precontrast scans (a), oozing externally from drainage (thick arrows), without appreciable contrast extravasation on both arterial (b) and venous (not shown) enhanced phases. Reintervention was required to achieve haemostasis at the gallbladder fossa and omentum. c, d On the 3rd postoperative day after laparoscopic cholecystectomy, precontrast (c) and contrast-enhanced (d) CT images showed hyperattenuating fresh blood (*) extending from the surgical bed below the right liver lobe, in the right parietocolic and peritoneal cul-de-sac. The patient was treated by positioning of percutaneous drainage