Table 1 Incidence and latency of mammary tumors in 5 serially passaged premalignant Balb/c outgrowth lines
HOG line | Passages (Number of outgrowths) | Number of tumors | Latency of tumor formation (mos) | Percent tumor formation |
|---|---|---|---|---|
1 | 6(24) | 9 | 13.5–22 | 37.5% |
2 | 6(24) | 10 | 15–22 | 41.7% |
3 | 23(102) | 31 | 14–22 | 30.4% |
4 | 11(44) | 13 | 16–22 | 29.5% |
5 | 8(32) | 11 | 14.5–22 | 34.4% |