GPT and cholesteryl ester measurement: Furthermore, the levels (U/L) of serum ALT, AST and ALP, which reflects the liver function of CE patients, were higher in patients with active CE1, CE2 cysts than in patients with inactive CE4 cysts (ALT: CE1 vs. CE2 vs. CE4: 58.8 ± 13.7 vs. 46.8 ± 11.6 vs. 28.3 ± 8.0 U/L; AST: CE1 vs. CE2 vs. CE4: 48.8 ± 10.4 vs. 47.5± 17.5 vs. 28.3 ± 5.5 U/L; ALP: CE1 vs. CE2 vs. CE4: 113.2 ± 17.9 vs. 127.3 ± 24.4 vs. 79.9 ± 9.3 U/L) (S1 Table).