How effective is breast biopsy for ductal carcinoma in situ?

Ductal carcinoma in situ consists of abnormal cells confined within a milk duct. It is often found because imaging shows calcifications or another change, rather than because it causes a noticeable symptom. During biopsy, tissue from the target is examined for the abnormal cells and their pattern.

A core sample gives more tissue for review than a cell-only sample. The pathologist may comment on grade, necrosis, and whether invasive cancer is seen in the material. Because DCIS can be scattered or occupy a wider area than the sample, the pathology must be considered alongside the scan and examination.

Ask how the target was located and whether the result matches the imaging appearance. Discuss whether additional sampling, surgery, or other assessment is needed. Take the pathology report to the appointment where treatment options are explained, and ask how the findings affect breast-conserving surgery or other choices.

After biopsy, call the clinic for persistent bleeding, spreading redness, drainage, fever, marked swelling, or increasing pain. Obtain urgent medical help for heavy bleeding, fainting, breathing trouble, or a rapidly worsening reaction.

Does the sample show DCIS only, or is invasive cancer present? Does the pathology agree with the imaging? How might the extent and grade influence the next procedure?