School ager with abdominal pain

CT of enlarged but normal appendix in cystic fibrosis
Axial CT with contrast of the abdomen (above left) shows a low density liver due to fatty infiltration and a low density pancreas with calcifications that has a round low density fluid collection near the pancreatic head. The appendix in the right lower quadrant posterior to the cecum is dilated in diameter up to 10 mm but has no periappendiceal inflammation (above right and below). There is stool mixed with air in the terminal ileum medial to the cecum (above right and below).

The diagnosis was fatty infiltration of the liver, acute pancreatitis with pseudocyst and chronic pancreatitis, distal intestinal obstruction syndrome, and normal appearance of the appendix in a patient with cystic fibrosis.