Table 1. The top five distribution of synchronous and metachronous double primary cancers in 18732 cases of breast cancer patients.
| DPC type | No.of MDPCs (%) (Total BC, n=18732) |
No.of SDPCs (%) (Total BC, n=18732) |
|---|---|---|
| Total DPC | 217(1.1) | 99(0.53) |
| Thyroid cancer | 91(0.49) | 53(0.28) |
| Endometrial cancer | 22(0.12) | 12(0.06) |
| Cervical cancer | 19(0.10) | 7(0.04) |
| Stomach cancer | 17(0.09) | 7(0.04) |
| Lung cancer | 12(0.06) | 5(0.03) |
Abbreviations: DPC: Double primary cancer, MDPCs: Metachronous double primary cancers, SDPCs: Synchronous double primary cancers