What does DCIS stand for?

Ductal refers to the milk ducts, carcinoma describes abnormal epithelial cells with cancer-like features, and in situ means in its original place. Clinicians may also call DCIS non-invasive breast cancer or stage zero breast cancer.

The key boundary is the wall around the duct. In DCIS, the abnormal cells have not been identified beyond that boundary in the examined sample. If cells cross into surrounding breast tissue, the diagnosis includes invasive breast cancer.

The label alone does not describe every feature that matters. A pathology report can also record grade, growth pattern, estimated extent, hormone-receptor status, and surgical margins. Imaging helps map the area, while a biopsy establishes the tissue diagnosis.

Meet with a breast specialist to review the images and pathology together. Ask whether the sample shows DCIS alone, how broad the affected area appears, and whether any further imaging or tissue assessment would change the surgical approach.

Treatment commonly centres on removing the involved tissue through lumpectomy or mastectomy, depending on distribution and individual circumstances. Radiotherapy may follow breast-conserving surgery, and hormone therapy may be considered when receptor findings and personal trade-offs support it.

Have a new breast or underarm lump, unexplained nipple discharge, nipple inversion, skin dimpling, or a persistent focal breast change assessed. None of these symptoms defines DCIS, and a clinician may use examination, mammography, and biopsy to identify the cause.

If you recently underwent a breast procedure, promptly contact the treating service about fever, expanding redness, increasing swelling, worsening pain, persistent bleeding, or wound discharge. Breathing difficulty, chest pain, fainting, or sudden severe illness requires urgent help.

Ask what in situ means in your report, whether invasion was absent in all examined tissue, what the stated grade signifies, how imaging extent affects surgery, and whether margins or hormone receptors have been reported. Request a written outline of the options and their likely side effects for you.