Pseudomyxoma peritonei with scalloping on CT scan and KUB radiograph

A plain film of the abdomen (A) of a 49-year-old man with pseudomyxoma peritonei demonstrates multicentric curvilinear calcifications in the right upper quadrant (arrows). A CT scan (B) of the same case demonstrates scalloping of the liver surface (arrow) and splenic surface (dashed arrow) caused by loculated accumulations of mucin with extensive peritoneal calcifications (arrowhead).