Fig. 1.

A 67-year-old woman with dropped gallstones (case 1). Numerous gallstones were seen on noncontrast CT before laparoscopic cholecystectomy (a: arrow). An irregular-shaped soft-tissue mass containing punctate calcifications was observed in the right Morrison's pouch on noncontrast CT (b: arrow). The mass invaded into the liver parenchyma and abdominal wall. The other irregular-shaped soft-tissue mass with nodular calcification was seen in the right paracolic gutter on noncontrast CT (c: arrow). The nodular calcification (c: arrow) was similar to the gallstones on CT before laparoscopic cholecystectomy (a: arrow). The tracer accumulated in the right Morrison's pouch lesion (SUVmax; 9.3) (d: arrow) and right paracolic gutter lesion (SUVmax; 8.0) (e: arrow) 120 minutes after intravenous administration of the tracer on ¹⁸F-fluorodeoxyglucose positron emission tomography with CT images. SUVmax; maximum standard uptake value