Laboratory investigation revealed increased transaminases (aspartate aminotransferase [AST] 125 IU/L, alanine aminotransferase [ALT] 155 IU/L; reference values < 40 IU/L), normal gamma‐glutamyl transferase (GGT) level (55 IU/L, reference value 12–58 IU/L) and no evidence of cholestasis, which persisted in subsequent evaluations. This evidence concerns the gene GPT and cholestasis.