[Rupture of hepatic echinococcal cyst by minimal blunt abdominal trauma].

Hepatic echinococcosis is endemic in Israel, with about 90 new cases diagnosed each year. Although many are asymptomatic for years, 40% develop complications. We describe a man of 37 and women aged 22 and 35, respectively, in whom rupture of an echinococcal cyst followed minimal, blunt abdominal trauma. In each patient the rupture led to complications consisting of massive intra-abdominal bleeding in 1, diffuse peritonitis in another and cystocutaneous fistula with ureteral obstruction due to reactive retroperitoneal fibrosis in the third. All 3 underwent surgery to resolve the immediate complication, with no mortality. A striking feature was the disproportion between the stormy clinical presentation and the relatively innocent nature of the trauma. In only 1 of our cases was the correct preoperative diagnosis made, which in this condition depends primarily on a high index of suspicion.