Predictive Factors of Liver Hydatid Cyst Recurrence in Children.

BACKGROUND: Liver hydatid cyst affects approximately 95% of the world's echinococcosis cases. Despite advances in treatment, the recurrence rate remains high and is influenced by several factors that are yet to be determined. The objective of this study was to identify the predictive factors of liver hydatid cyst recurrence following surgery in children and to establish a treatment regimen aimed at preventing this postoperative morbidity. METHODS: A bi-centric retrospective descriptive and analytic study was conducted involving 122 children who underwent surgery for liver hydatid cysts between January 1st, 2009, and December 31st, 2017. All factors that could potentially contribute to recurrence were thoroughly investigated. The data was processed using SPSS.v21, and a significant level of p-value 0.05 was applied. RESULTS: Out of the 122 children, 20 patients experienced cyst recurrence (16.39%). Among them, there were nine girls and eleven boys. The median time of recurrence was 16.5 months. Abdominal ultrasonography demonstrated efficacy in detecting recurrence. Several factors were identified as predictors of postoperative recurrence, including intimate contact of the hydatid cyst with the large vessels (p = 0.031), intraperitoneal effusion (p = 0.042), bile duct dilation (p = 0.032), and postoperative spontaneous discontinuation of medical treatment (p = 0.010). Among these factors, two independent risk factors for recurrence were identified: intimate contact of the hydatid cyst with the large vessels (p = 0.011) and the presence of an intraperitoneal effusion (p = 0.018). CONCLUSION: Our study has identified several predictors of postoperative recurrence, including two previously undocumented risk factors in the literature. Awareness of these risk factors can assist surgeons in implementing preventive measures to avoid the recurrence of hydatid cysts. LEVEL OF EVIDENCE: Prognosis study Level II.

Changes in Urinary Stone Composition in the Tunisian Population: A Retrospective Study of 1,301 Cases

BACKGROUND: Studies that evaluate the effect of age on stone composition are scarce. The aim of this study was to highlight the changes in epidemiological characteristics (stone composition and location) of urolithiasis according to patients' age. METHODS: We studied 1,301 urolithiasis patients with age ranging from 6 months to 92 yr (781 males and 520 females). Stone analysis was performed using a stereomicroscope and infrared spectroscopy to determine the morphological type and molecular composition of each stone. RESULTS: The annual average incidence of new stone formation was 31.7 per 100,000 persons. In 71.8% of cases, calculi were located in the upper urinary tract. Compared to other age groups, children and old men were more affected by bladder stones. Calcium oxalate monohydrate was the most frequent stone component, even though its frequency decreased with age (59.5% in young adults and 43.7% in the elderly, P<0.05) in favor of an increase in uric acid stones (11.5% in young adults and 36.4% in the elderly, P<0.05). Struvite stones were rare (3.8%) and more frequent in children than in adults. CONCLUSIONS: The analysis of these data showed that urinary stones in Tunisian patients are tending to evolve in the same direction as the stones in patients from industrialized countries.