Bariatric Surgery Helps NASH

G Lassailly et al. Gastroenterol 2020; 159: 1290-1301. Bariatric Surgery Provides Long-term Resolution of Nonalcoholic Steatohepatitis and Regression of Fibrosis

This was a  prospective study of 180 severely obese patients with biopsy-proven NASH.

Key findings:

  • NASH: At 5 years after bariatric surgery, NASH was resolved, without worsening fibrosis, in samples from 84% of patients (n = 64; 95% confidence interval, 73.1%-92.2%). 
  • Fibrosis: Fibrosis decreased, compared with baseline, in samples from 70.2% of patients (95% CI, 56.6%-81.6%). Fibrosis disappeared from samples from 56% of all patients (95% CI, 42.4%-69.3%) and from samples from 45.5% of patients with baseline bridging fibrosis. 
Graphic Abstract

My take: This study showed that patients with NASH who underwent bariatric surgery had resolution of NASH in liver samples from 84% of patients 5 years later. The reduction of fibrosis was progressive, beginning during the first year and continuing through 5 years.

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