Background: Cholelithiasis and its predisposing factors are less characterized in thalassemia syndromes. In the present study, we assessed the prevalence of gallstones and related-risk factors among thalassemia major (TM) patients in south-east of Iran. Materials and Methods: The patients were recruited form a single center in Zabol city, south-east of Iran. Demographic and clinical information were retrieved from medical histories. Abdominal ultrasonography was performed to scrutinize gallstones and organ dimensions of liver, spleen, gallbladder and kidney. Results: The study participants (n=127) consisted of 50 (39.4%) males and 77 (60.6%) females. The mean age of the patients was 15.2±7.9 years. Cholelithiasis was observed in 11 (8.7%) patients. Cholelithiasis was significantly associated with age (P=0.002) and splenectomy (P=0.001). The patients with cholelithiasis received a significantly higher blood volume than patients without cholelithiasis (546±108.7 ml and 425.1±134.7 ml, respectively, P=0.007). There were significant differences between cholelithiasis and non- cholelithiasis TM patients regarding the length of right and left liver lobes (P=0.001), as well as the length of gallbladder (P=0.006). Ferritin level was not associated with cholelithiasis in our patients. In multivariate analysis, age older than 15 (OR=10.4, 95% CI: 1.2-86.3, P=0.02) and 30 years old (OR=42.6, 95% CI: 2.9-613, P=0.006), and splenectomy (OR=8.7, 95% CI: 2.1-35.4, P=0.002) were significant risk factors for cholelithiasis. Conclusion: Cholelithiasis is a relatively common complication among TM patients in our region. The most prominent risk factors of cholelithiasis were advanced age, splenectomy and large-volume blood transfusion.
Keywords: Cholelithiasis; Gallstone; Thalassemia.