Table 1: Type of mammary IELs and corresponding relative risks for invasive carcinoma. Atypical Ductal Hyperplasia (ADH), Atypical Lobular Hyperplasia (ALH).
| Relative risk for invasive carcinoma | Type of mammary IEL | |
| No increase | Adenosis | |
| Low | Sclerosing adenosis | |
| Intraductal papilloma | ||
| Sclerosing papilloma | ||
| Ductal hyperplasia | ||
| Intermediate | ADH-ALH | |
| High | DCIS | Low grade |
| Intermediate | ||
| High grade | ||