Fig. 2.

Changes in beta-human chorionic gonadotropin (β-hCG) in 3 patients. (A) β-hCG levels of patient 1 were persistently high, above normal range. (B) β-hCG levels of patient 2 were normal during follow-up and increased above normal range at tumor diagnosis. (C, D) In patient 3, β-hCG level slightly decreased to 27 mIU/mL during follow-up but increased to 397 mIU/mL at 8 months. At the ninth month, β-hCG level sharply increased to 14,040 mIU/mL and pineal germ cell tumor was found at that time.