Ductal carcinoma in situ of the breast is clinically known as ductal carcinoma in situ of the breast, and some patients can be cured. Ductal carcinoma in situ is a special type of breast cancer. Currently, ductal carcinoma in situ is defined as a new organism originated from the ductal epithelium of breast tissue, but the lesion is limited to the basement membrane without invading into the surrounding mesenchyme, and it is still in the early stage of the disease. Theoretically, ductal carcinoma in situ can be cured. Currently, the main clinical modalities available for the treatment of ductal carcinoma in situ include total mastectomy, breast preservation surgery, adjuvant radiation therapy, chemoprevention, etc. Although there is a difference in survival among different treatment modalities, it is not possible to cure ductal carcinoma in situ. Although the survival difference between different treatment modalities is usually very small, patients still need to implement individualized treatment plans according to their personal situation. In conclusion, some patients with ductal carcinoma in situ can be cured, but patients should pay attention to regular follow-up after treatment, and intervene promptly if there is any recurrence of the disease.