Spilled gallstones mimicking a retroperitoneal sarcoma following laparoscopic cholecystectomy

Figure 1 Five months after primary laparoscopic cholecystectomy, computed tomography scan was performed for evaluation of right upper quadrant pain. A and B: Abdominal CT scan revealed a 4.9 cm × 4.6 cm sized, ill-defined heterogenous retroperitoneal mass in posterolateral sub-hepatic and posterior perirenal space involving posterior abdominal wall (arrows); C: No calcified stone was seen to suggest spilled gallstones in the pre-contrast enhanced CT scan. CT: Computed tomography.