Table I Histopathological characteristics of 65 samples selected for analysis (proteomics and metabolomics analysis, RNA, and protein validation)
CharacteristicNo. of patients
Gender
    Female7
    Male58
Age
    <6033
    ≥6032
Tumor size (cm3)
    <510
    ≥555
Tumor differentiation
    Moderate42
    Poor23
Tumor infiltration depth
    ≤T321
    T444
Lymph node metastasis
    N011
    N154
TNM stage
    I3
    IIa16
    IIb6
    III40