What are hepatic cysts? Hydatid

Hydatid Cyst DEFINITION A hepatic cyst caused by Echinococcus multilocularis or Echinococcus granulosus that is usually solitary and involves the right lobe of the liver. RISK FACTORS Exposure to dogs, sheep, foxes, wolves, domestic cats, or foreign travel. SIGNS AND SYMPTOMS Most commonly asymptomatic; can cause hepatomegaly. DIAGNOSIS Often picked up incidentally on ultrasound, CT, or abdominal films, which may show calcifications outlining the cyst; eosinophilia, serology. TREATMENT Never aspirate these cysts or they will spill their contents. Treat with albendazole or mebendazole followed by surgical excision or unroofing.