Figure 1

Serum measurements of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) during the patient’s admission. Normal reference ranges are from 0 to 41U/L for ALT and from 0 to 37U/L for AST. Day 0 (*) represents the day of admission and discontinuation of phenytoin. Corticosteroid therapy was begun on Day 2 (**).