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Table 3 Liver disease category based on liver biopsy at pre- and post-RYGB time points

From: Reversal of fibrosis in patients with nonalcoholic steatohepatosis after gastric bypass surgery

Liver disease category Definition Pre-RYGB Post-RYGB
(N = 105) (N = 15)
No. (%) No. (%)
Normal Liver Steatosis <5% 27 (26) 11 (73)
Steatosis >5% without any ballooning   
NAFLD Cells and lobular inflammation <2 foci per 200 x field 41 (39) 2 (13)
NASH Steatosis >5% with at least a few balloon cells, lobular inflammation >2 foci per 200 x field 26 (25) 1 (7)
NASH + Fibrosis Steatosis >5% with at least a few balloon cells, lobular inflammation >2 foci per 200 x field and stage 3 or 4 fibrosis 11 (10) 1 (7)
  1. NAFLD nonalcoholic fatty liver disease, NASH nonalcoholic steatohepatitis RYGB Roux-en-Y gastric bypass