We report the case of a young Algerian female with a voluminous abdominal tumour suggestive of a hydatic cyst of the liver. Complementary examinations (radiography of adjacent organs, ultrasonography, coelio-mesenteric arteriography, hepatic scanning) revealed two additional abdominal cysts. Furthermore, gynaecologic examination and ultrasonography revealed one intra-uterine hydatic cyst. At laparotomy however, the surgeon removed sixteen abdominal and five pelvic cysts, all of them containing brood capsules. It should be noted that one eleven centimeters-diameter splenic cyst was discovered only at operation. The authors point out the rarity of the uterine location of hydatidosis and stress the difficulty of the preoperative localization of all the cysts. In these widespread forms of the disease, complementary flubendazole treatment could be useful.