Inflammatory pseudotumor can develop in any part of the human body. It is one of the most important tumor-mimicking lesions that require differential diagnosis. There are various causes of inflammatory pseudotumor, one of which is infection and its resultant inflammation. Pelvic inflammatory disease (PID) often causes perihepatitis, which is called Fitz-Hugh-Curtis syndrome. In Fitz-Hugh-Curtis syndrome, bacteria spread along the right paracolic gutter, causing inflammation of the right upper quadrant peritoneal surfaces and the right lobe of the liver. We experienced a case of PID with accompanying inflammatory pseudotumor in the liver and the right omentum. This case identically correlates with the known intraperitoneal spreading pathway involved in Fitz-Hugh-Curtis syndrome, and hence, we present this case report.