Taking a 20-year-old (100 points) male (93 points) patient for example, if AFP and HCG were normal (0 point), the tumor was predominantly before G-I line (26 points) and blurred in boundary (55 points), the total points calculated from the nomogram would be 274, indicating a more than 90% risk of GCT. The gene discussed is AFP; the disease is granular cell tumor.