Since it is not possible to assess malignancy or benignity with 100 percent certainty on the basis of a mammogram, a system has been introduced that enables risk assessment. BI-RADS actually means “Breast Imaging Reporting and Data System” and is divided into seven categories.
BI-RADS 0: Further imaging for assessment is necessary because mammography is not assessable.
BI-RADS I: BI-RADS I: Routine screening is recommended based on a normal appearance.
BI-RADS II: BI-RADS II: A clearly benign change is evident, so routine checks are recommended.
BI-RADS III: Because a benign change is evident with a cancer risk of less than 2%, repeat screening after six months is advised.
BI-RADS IV: It is possible that the finding is malignant, which is why a biopsy and a follow-up examination after six months are recommended.
BI-RADS V: Because a carcinoma (cancer) is thought to be present, the risk of cancer is greater than 95% and therapeutic action is taken accordingly.
BI-RADS VI: A carcinoma is histologically confirmed and is treated with surgery or chemotherapy.