GPT and nasopharyngeal carcinoma: Similarly, ALT and AST activities were significant lower in PPC group than in NPC group within 24 hrs after surgery (P < 0.05 at the end of surgery, 6‐hr and 24‐hr post‐surgery for AST activities, and P < 0.05 at the end of the surgery and 6‐hr post‐surgery for ALT activities) (Fig. 1E and F).