Predictors of morbidity and mortality in the surgical management of hydatid cyst of the liver

Background/aims Surgery for hydatid cyst of the liver is widely practiced worldwide; this type of management is still associated with high mortality and morbidity. The aim of this study is to find out possible predictors for this high mortality and morbidity. Materials and methods The medical records of 169 patients who underwent surgery for hydatid cyst of the liver were retrospectively reviewed. The mortality and the morbidity rates were assessed as well as the following eight potential predictors of mortality and morbidity: age of the patients, size of the cyst, number of cysts, other organs involved by the disease, the presence of preoperative complications, the type of surgery performed (radical or conservative), whether the disease was new or recurrent, and when surgery was performed in the first period (1973-1986) or in the second period (1987-1999). Cross-tabulation and logistic regression between mortality and morbidity (dependent variable) and the above-mentioned eight potential predictors (independent variables) were carried out. Results Of the 169 patients, 112 were female subjects and 57 male subjects, the age range was from 5 to 85 years (mean=39.2 years), the mortality rate was 6.5% (n=11), and the overall morbidity rate was 53.8% (n=91), while specific complications of liver hydatid cyst surgery were seen in 32% (n=54). Patients of age > 40 years, with a cyst diameter of > 10 cm, who presented with pre-operative complications, who had conservative surgery, and who had surgery before 1987 were having a significantly higher mortality and morbidity rate. Conclusion Age, size of the cyst, the presence of pre-operative complications particularly cyst-biliary communication, and type of surgical procedure performed (conservative or radical) represent as significant predictors of mortality and morbidity of surgery for liver hydatid cyst.