Final answer:
Breast malignancy that is unilateral and originates from a single duct is referred to as unilateral ductal carcinoma, affecting only one breast and potentially being in situ or invasive.
Step-by-step explanation:
You asked about a specific characteristic of breast malignancy. Specifically, you mentioned that 10-15% of breast malignancy is unilateral and originates from a single duct. This description refers to unilateral ductal carcinoma, which is a type of breast cancer that starts in the cells of the ducts.
Breast cancer is a disease in which malignant (cancer) cells form in the tissues of the breast. Unilateral means that the carcinoma affects only one breast. Ductal carcinoma can be in situ, meaning it is confined to the ducts, or it can be invasive, spreading to surrounding breast tissue.
According to Figure 22.6.1 from the National Cancer Institute/Univ. of Pittsburgh Cancer Institute, even a single cell can divide and contribute to the development of cancer. Treatment options and prognosis for breast cancer depend on several factors, including the stage and subtype of the cancer.