23-year-old female with ductal dilatation on CT and right upper quadrant pain. Evaluate for a small stone causing ductal dilatation. ABDOMEN:LIVER, BILIARY TRACT: Similar-appearing mild intra and extrahepatic biliary ductal dilatation. The distal common bile duct measures 8.1 mm in diameter. There is a 3 mm stone in the midportion of the common bile duct (coronal series 801 image 61). The common bile duct remains dilated distal to this portion, and a benign stricture at the ampulla is suspected. In the peripheral aspect of hepatic segment 6, there is a 1.5 x 1.4 cm arterially enhancing focus that is isointense on the precontrast, portal venous, and delayed phases. No washout. No restricted diffusion. No corresponding lesion is identified on the prior CT scan.SPLEEN: No significant abnormality noted.PANCREAS: No pancreatic ductal dilatation.ADRENAL GLANDS: No significant abnormality noted.KIDNEYS, URETERS: No significant abnormality noted.RETROPERITONEUM, LYMPH NODES: No significant abnormality noted.BOWEL, MESENTERY: No significant abnormality noted.BONES, SOFT TISSUES: No significant abnormality noted.OTHER: No significant abnormality noted.
1.Choledocholithiasis with mild intra and extrahepatic biliary ductal dilatation. Additionally, a benign stricture at the ampulla is suspected.2.A peripheral arterial enhancing focus of hepatic segment 6 is isointense on all other series. A perfusional variant is favored. A benign focal nodular hyperplasia is less likely. 