Introduction: Toxocariasis is a common helminth infection that causes visceral larva migrans in humans. It has a wide and varied clinical spectrum.
Case: A 60-year-old woman consulted after 6 months of recurrent biliary pain with fever. Laboratory tests showed moderate disturbance of liver enzymes and hypereosinophilia (10 400/mm3). Imaging studies revealed a pseudotumor in hepatic segment IV, hyperechoic in abdominal ultrasound and low density in computed tomography. The diagnostic conclusion after ultrasound-guided liver biopsy was unspecific granulomatous hepatitis and eosinophilic infiltrate. The course of the antibody titer to Toxocara canis finally resulted in a diagnosis of Toxocara infection. Outcome was good following treatment with diethylcarbamazine.
Discussion: Some clinical features of liver toxocariasis can mimic tumors and may be interpreted histologically as granulomatous hepatitis, eosinophilic infiltrate of the hepatic portal vein, and/or necrotizing eosinophilic abscesses. Treatment is not yet well codified, but the symptomatic forms call for albendazole or diethylcarbamazine.