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. 2021 Oct 15;13(10):11689–11696.

Table 2.

The clinical and pathologic characteristics of TN-MBC

Variables N %
Age (median, range) 62 (22-89) -
Race/ethnicity (n, %)
    White 877 76.5
    Black 190 16.6
    Other 79 6.9
Insurance (n, %)
    No 189 16.5
    Yes 957 83.5
Marital state (n, %)
    Unmarried 268 23.4
    Married 878 76.6
Grade (n, %)
    Undifferentiated 34 3.0
    Poorly differentiated 795 69.4
    Moderately differentiated 132 11.5
    Well differentiated 51 4.5
    Unknown 134 11.7
Tumor size (n, %)
    T1 289 25.2
    T2 550 48.0
    T3 202 17.6
    T4 56 4.9
Regional node status (n, %)
    N0 918 80.1
    N1 170 14.8
    N2 33 2.9
    N3 25 2.2
TNM stage (n, %)
    I 261 22.8
    II 673 58.7
    III 156 13.6
    IV 56 4.9
Chemotherapy (n, %)
    No 378 33.0
    Yes 768 67.0
Radiotherapy (n, %)
    No 638 55.7
    Yes 508 44.3
Surgery mode (n, %)
    No surgery 63 5.5
    BCS 470 41.0
    TM 369 32.2
    Radical mastectomy 244 21.3

Abbreviations: MBC = metaplastic breast cancer; BCS = breast conserving surgery; TM = Total mastectomy.