| All Races | Asian/Other | Black | Hispanic | Non-Hispanic White | |||||
| Primary Site (ICD-O) (2) | All Ages | < 50 | 50 + | ||||||
| Cases | (%) | (%) | (%) | (%) | (%) | (%) | (%) | ||
| Breast-invasive | |||||||||
| Nipple and areola (174.0) | 1,030 | 1.2 | 1.1 | 1.2 | 1.1 | 0.9 | 1.3 | 1.2 | |
| Central breast (174.1) | 5,342 | 6.2 | 5.5 | 6.5 | 7.4 | 5.7 | 6.7 | 6.2 | |
| Upper-inner quadrant (174.2) | 7,757 | 9.1 | 9.5 | 8.9 | 11.0 | 9.1 | 9.6 | 8.9 | |
| Lower-inner quadrant (174.3) | 4,044 | 4.7 | 4.2 | 4.9 | 4.8 | 5.2 | 4.7 | 4.7 | |
| Upper-outer quadrant (174.4) | 32,015 | 37.4 | 38.1 | 37.2 | 35.4 | 35.7 | 36.4 | 37.9 | |
| Lower-outer quadrant (174.5) | 5,285 | 6.2 | 6.2 | 6.2 | 5.2 | 6.6 | 6.3 | 6.2 | |
| Axillary tail (174.6) | 767 | 0.9 | 1.0 | 0.9 | 0.6 | 0.9 | 0.8 | 0.9 | |
| Midline, inner, outer, upper or lower (174.8) | 16,560 | 19.3 | 19.7 | 19.2 | 19.2 | 17.1 | 18.7 | 19.7 | |
| Breast, NOS (174.9) | 12,796 | 14.9 | 14.7 | 15.0 | 15.3 | 18.7 | 15.7 | 14.4 | |
| Total invasive | 85,596 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | |
| (N=19,843) | (N=65,753) | (N=4,204) | (N=4,720) | (N=7,942) | (N=67,967) | ||||
| Breast-in situ | |||||||||
| Nipple and areola (174.0) | 152 | 1.3 | 0.9 | 1.5 | 1.9 | 1.3 | 1.0 | 1.3 | |
| Central breast (174.1) | 741 | 6.5 | 5.2 | 7.0 | 7.6 | 7.1 | 7.5 | 6.3 | |
| Upper-inner quadrant (174.2) | 758 | 6.6 | 7.1 | 6.4 | 8.6 | 7.9 | 6.7 | 6.5 | |
| Lower-inner quadrant (174.3) | 609 | 5.3 | 4.9 | 5.5 | 4.8 | 8.8 | 4.7 | 5.3 | |
| Upper-outer quadrant (174.4) | 3,988 | 34.9 | 34.5 | 35.0 | 28.9 | 35.3 | 35.3 | 35.3 | |
| Lower-outer quadrant (174.5) | 666 | 5.8 | 6.1 | 5.7 | 6.7 | 6.0 | 5.2 | 5.8 | |
| Axillary tail (174.6) | 38 | 0.3 | 0.4 | 0.3 | 0.5 | 0.4 | 0.4 | 0.3 | |
| Midline, inner, outer, upper or lower (174.8) | 2,027 | 17.7 | 17.6 | 17.8 | 17.2 | 16.7 | 19.4 | 17.8 | |
| Breast, NOS (174.9) | 2,457 | 21.5 | 23.2 | 20.8 | 23.9 | 16.5 | 19.8 | 21.4 | |
| Total in situ | 11,436 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | |
| (N=3,337) | (N=8,099) | (N=582) | (N=533) | (N=866) | (N=9,271) | ||||
Source: California Cancer Registry, November 1994. Excludes lymphohematopoietic neoplasms of the breast (ICD-O, Field Trial edition, histology codes 9590-9970) (2).
1 Race/ethnicity categories are mutually exclusive. Persons of Hispanic ethnicity are identified by medical record and/or surname, and may be of any race. Persons of unknown race/ethnicity are excluded from race-specific data.
2 Numbers in parentheses are ICD-O, Field Trial edition, primary site codes (2). NOS=not otherwise specified.
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