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| Histologic type | No. of patients (%) |
|---|---|
| Ductal carcinoma in situ | 1,417 (13.5) |
| Invasive ductal carcinoma | 8,375 (79.6) |
| Lobular carcinoma in situ | 64 (0.6) |
| Invasive lobular carcinoma | 432 (4.1) |
| Paget's disease (pure form) | 7 (0.07) |
| Malignant phyllodes tumor | 37 (0.34) |
| Lymphoma | 1 (0.01) |
| Sarcoma | 8 (0.08) |
| Others | 175 (1.7) |
| Total | 10,516 (100.0) |
KBCS=Korean Breast Cancer Society.
