IntroductionHydatid cyst is caused by infection with a parasite belonging to theEchinococcus family. Humans are the intermediate host of this disease and get infected directly or indirectly after the parasite eggs enter the digestive system. According to the WHO, it is considered a neglected disease world-wide, as it still remains highly prevalent despite the improvement of public health and following sanitary protocols by humans (1,2). This disease is mostly asymptomatic and is incidentally detected (3). Usually, only one cyst is formed during infection, and the formation of several cysts and the involvement of several organs is not common. The most commonly involved organ is the liver, followed by the lung. The involvement of other organs is much less common, and the involvement of the peritoneum and omentum is very rare, and is usually caused by abdominal trauma, the rupture of a cyst in the liver or other organs, and the release of parasites leading to the contamination of the abdominal space (4). In this study, we introduce a case of hydatid cysts in liver, spleen and peritoneum, in which the radiological appearance and clinical symptoms had raised high suspicion of abdominal malignancy and peritoneal seeding.