DCIS and lumpectomy: what to expect

It may be suitable when imaging suggests the abnormal area can be removed with acceptable breast shape. The final decision also depends on breast size, the extent and position of DCIS, personal preferences, and whether clear surgical margins are achievable.

DCIS consists of abnormal cells contained inside breast ducts. During lumpectomy, the surgeon removes the area identified on imaging along with nearby tissue. If the area cannot be felt, imaging guidance may be used to help locate it before surgery.

A pathologist examines the removed tissue to confirm the diagnosis, measure the extent, and assess the margins. A clear margin means no DCIS is seen at the cut edge. DCIS at or close to an edge may lead to discussion of another operation, depending on the pathology and the surgical plan.

Before surgery, confirm which medicines to continue or pause, how the abnormal area will be localised, and what support you will need at home. Follow the wound-care instructions, wear any recommended supportive bra, and increase arm and daily activity as advised.

Radiotherapy is often discussed after breast-conserving surgery to reduce the chance of DCIS returning in the treated breast. Hormone-receptor testing may also influence whether endocrine treatment is considered. Mastectomy can be discussed when DCIS is too extensive for a satisfactory lumpectomy or when clear margins remain difficult to obtain.

After surgery, seek urgent medical help for trouble breathing, chest pain, fainting, or rapidly increasing breast swelling. Contact the surgical team promptly for fever, spreading redness, worsening warmth, pus-like drainage, uncontrolled pain, persistent bleeding, or a wound that opens.

New breast skin changes, nipple discharge, a new lump, or swelling that appears after recovery deserves a clinical assessment. Attend planned follow-up even when you feel well, because examination and breast imaging help monitor the treated and opposite breast.

Ask how large the DCIS appears on imaging, whether localisation is needed, and how much tissue is expected to be removed. You can also ask what margin result your team uses to guide further surgery, how the operation may affect breast shape, when pathology will be discussed, and whether radiotherapy or endocrine treatment is likely to be considered.