Regarding the T stage of the tumor, median serum GP88 levels were almost equal in low-grade tumors (T1/2) compared with advanced tumors (T3/T4; 51.2 ng/mL vs. 52.9 ng/mL; p = 0.847; Mann–Whitney U-Test; see Figure 2c). The gene discussed is GRN; the disease is neoplasm.