Table 1.
Characteristics of invasive breast cancer cases
| All (n = 358) | ||
|---|---|---|
| No. | Percent of total1 | |
| Age group | ||
| 25–49 | 83 | 23.2 |
| 50–69 | 184 | 51.4 |
| ≥70 | 91 | 25.4 |
| Race/ethnicity | ||
| Caucasian | 105 | 29.3 |
| Japanese | 122 | 34.1 |
| Native Hawaiian | 56 | 15.6 |
| Other2 | 75 | 21.0 |
| Stage3 | ||
| Localized | 243 | 67.9 |
| Advanced regional involvement | 105 | 29.3 |
| Distant metastases | 10 | 2.8 |
| Histology | ||
| Infiltrating ductal carcinoma4 | 302 | 84.4 |
| Lobular carcinoma | 17 | 4.8 |
| Mucinous adenocarcinoma | 11 | 3.1 |
| Other | 28 | 7.8 |
| Grade | ||
| Well-differentiated | 34 | 9.5 |
| Moderately differentiated | 130 | 36.3 |
| Poorly-/undifferentiated | 131 | 36.6 |
| Unknown | 63 | 17.6 |
| ER5 | ||
| Negative | 90 | 27.7 |
| Positive | 235 | 72.3 |
| PR5 | ||
| Negative | 123 | 37.8 |
| Positive | 202 | 62.2 |
| HER25 | ||
| Negative | 265 | 80.8 |
| Positive | 63 | 19.2 |
| ER, PR and HER25 | ||
| ER−/PR−/HER2− | 48 | 14.7 |
| ER+ and/or PR+ and/or HER2+ | 279 | 85.3 |
| First course of treatment | ||
| Surgery only | 64 | 17.9 |
| Surgery and radiation (with or without other therapy) | 193 | 53.9 |
| Surgery and other treatment | 97 | 27.1 |
| Other | 4 | 1.1 |
| Vital status6 | ||
| Alive | 181 | 50.6 |
| Deceased- breast cancer | 66 | 18.4 |
| Deceased- other causes | 111 | 31.0 |
ER, estrogen receptor; PR, progesterone receptor; HER-2, human epidermal receptor-2.
1
Total percent may be slightly lower or higher than 100 due to rounding.
2
Includes Chinese, Filipina, Other Asian, Other Pacific Islander, and other race/ethnic groups.
3
Based on SEER extent of disease; advanced disease includes regional involvement and distant metastases.
4
Includes nine cases of infiltrating ductal carcinoma plus other histologic types.
5
Excludes cases with inadequate IHC results.
6
After 17 years of follow-up post-diagnosis.