The effect of cholecystectomy for symptomatic gall stone disease on hepatic steatosis using transabdominal ultrasonography: An observational prospective study.

Objectives: Hepatic steatosis and gallstones are common in the general population, with risk factors being multifactorial. Experimental studies have shown that cholecystectomy increases hepatic steatosis and leads to non-alcoholic fatty liver disease (NAFLD). In order to evaluate this, the current study was carried out in the department of general surgery at a medical school, in the north of India.

Material and methods: One hundred and three patients awaiting cholecystectomy were selected after written informed consent. Their baseline characteristics were captured preoperatively and thereafter followed at 3^rd month with liver function test (LFT), lipid profile and ultrasound (USG) abdomen.

Results: Average age of the patients enrolled was 41.62 ± 13.62 years and mean body mass index (BMI) was 25.96 ± 1.73 kg/m² . Total bilirubin (0.56 vs 0.76, p <0.0001) and direct bilirubin (0.15 vs 0.27, p <0.0001) decreased significantly post cholecystectomy as compared to preoperative values. Levels of serum glutamic-oxaloacetic transaminase (SGOT) (49.14 vs 34.98 IU/dL), serum glutamic-pyruvic transaminase (SGPT) (50.85 vs 35.46 IU/dL) and alkaline phosphatase (ALP) (101.16 vs 85.97 IU/dL) increased significantly post-surgery. Cholesterol values (146.28 vs 168.77 mg/dL), triglycerides (TGs) (119 vs 133.56 mg/dL), low density lipoprotein (LDL) (93.32 vs 113.05 mg/dL) and very low density lipoprotein (VLDL) (18.68 vs 27.45 mg/dL) decreased significantly while high density lipoprotein (HDL) (48.96 vs 42.42 mg/dL) increased significantly at three month follow-up. Prevalence of fatty liver increased post operatively with a rise in Grade 1 steatosis (75%). Severity of fatty liver increased with (8.73%) Grade 3 steatosis on USG post-surgery. Hence, new patients with formerly normal USG reports developed fatty liver and those with preexisting liver steatosis seemed to worsen.

Conclusion: The study concluded that the prevalence of fatty liver increased post-cholecystectomy. Lipid profile parameters improved favorably with a decline in total cholesterol, TG, LDL and VLDL versus increase in HDL. LFT parameters also changed significantly.