A Case of Inflammatory Pseudotumor of the Liver Caused by Parasite Eggs

Abstract

A 60-year-old woman was admitted to our hospital for further examination of a liver tumor detected by ultrasonography at a health check. Dynamic CT showed a tumor with a diameter of 12 mm, with peripheral enhancement in segment 5 of the liver. Since the tumor was small and atypical, she was observed on an outpatient basis. Six months later, dynamic CT showed that the liver tumor had grown to a diameter of 20 mm. On EOB-MRI, the tumor showed low intensity on T1WI and high intensity on T2WI. A benign tumor, such as an inflammatory pseudotumor, was suspected. However, since malignancy could not be completely excluded, she underwent laparoscopic partial hepatectomy. Pathological examination showed that it was an inflammatory pseudotumor with parasite eggs. Laparoscopic hepatectomy is one of the effective solutions for liver tumors for which definitive diagnosis is difficult.