What should you know about extensive ductal carcinoma in situ?

Ductal carcinoma in situ, often called DCIS, is a non-invasive breast cancer in which abnormal cells remain inside the milk ducts. Extensive indicates that the affected area is broad or covers more than a small, localised focus. It does not alone establish invasion, spread, or the final treatment.

Many people have no obvious symptom and are diagnosed after breast imaging. A biopsy identifies the cells, while further imaging and surgical tissue may clarify how widely they extend. Pathology also considers grade, necrosis, margins, and hormone receptors.

Your breast team will combine the examination, mammogram, biopsy, and other imaging with your preferences. If the area can be removed while preserving the breast, lumpectomy may be discussed. When the area is widespread or breast conservation is unsuitable, mastectomy may be considered. Radiotherapy can follow breast-conserving surgery in some cases, and hormone therapy may be offered when receptor results support it.

Ask for a clear explanation of the proposed operation, margin plan, reconstruction choices if relevant, and follow-up schedule. A second pathology review can be discussed if a report is difficult to interpret.

Arrange prompt clinical review for a new breast lump, nipple discharge that is bloody, skin or nipple changes, or a rapidly changing breast. After a biopsy or operation, contact the team for fever, increasing redness, swelling, drainage, or worsening pain. Emergency care is appropriate for heavy bleeding, fainting, chest pain, or sudden breathlessness.

Ask how extensive the area is on imaging and pathology, whether invasion was excluded, which operation offers clear margins, whether radiotherapy or hormone therapy is advised, and how the other breast will be monitored.