Table 1.

Type of mammary IELs and their associated tumors

Relative risk for invasive carcinomaIELNo. cases associated with malignant* tumors/total
No increaseAdenosis0/4
LowSclerosing adenosis0/2
Intraductal papilloma0/3
Sclerosing papilloma3/3
Ductal hyperplasia2/10
    Low grade4/6
    High grade16/16
  • * All malignant tumors were invasive carcinomas except for one tumor associated with ADH, one tumor associated with intermediate-grade DCIS, and two tumors associated with high-grade DCIS, which were carcinosarcomas. There were no sarcomas associated with any detected IELs.