| Group | Number | Number of PGCCs | χ2 | P value |
---|---|---|---|---|---|
Primary breast cancer with lymph node metastasis | I | 52 | 22.62 ± 1.15 | 125.193 | 0.000 |
Corresponding metastatic tumor | II | 52 | 41.04 ± 1.49 | ||
Primary breast cancer without metastasis | III | 52 | 11.35 ± 0.90 | ||
Benign breast tumor | IV | 11 | 0 |