Final answer:
Breast-conserving therapy with radiation therapy is a treatment option for certain breast tumors such as ductal carcinoma in situ (DCIS) and invasive ductal carcinoma (IDC). Invasive lobular carcinoma (ILC) is not typically treated with BCT.
Step-by-step explanation:
Breast-conserving therapy (BCT) with radiation therapy (RT) is a treatment option for certain breast tumors. The tumors that are candidates for BCT with RT are ductal carcinoma in situ (DCIS) and invasive ductal carcinoma (IDC). Invasive lobular carcinoma (ILC) is not typically treated with BCT because it tends to spread more diffusely within the breast.