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What Does Calcification Mean on a Mammogram?

Breast calcifications are calcium deposits seen on a mammogram. Most are benign, but patterns can change follow-up.

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Sources last checked: 2026-07-20Last updated: 2026-07-20Next planned review: 2027-07-20

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NCI source

NCI Dictionary of Cancer Terms - calcification

Visual summary for What Does Calcification Mean on a Mammogram?

The short answer

Calcifications are calcium deposits in breast tissue that can be seen on a mammogram but cannot be felt. NCI distinguishes macrocalcifications, which are usually not related to cancer, from microcalcifications, which are tiny specks. A cluster or suspicious pattern of microcalcifications may need more imaging or biopsy.

  • Calcifications are calcium deposits seen on mammogram images.

  • They cannot be felt by touch and are not caused by eating calcium.

  • Macrocalcifications are usually benign.

  • Microcalcification pattern, grouping, and BI-RADS category guide follow-up.

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The full explanation.

The short answer

Calcifications are small deposits of calcium in breast tissue. They show up on mammograms but are too small or too deep to feel. The key issue is not the word itself, but the size, pattern, grouping, and BI-RADS recommendation.

Macrocalcifications

Macrocalcifications are larger calcium deposits. NCI notes they are usually not related to cancer. They may be linked with normal aging, past injury, inflammation, cysts, or other benign breast changes.

Microcalcifications

Microcalcifications are tiny specks. Many are benign, but clusters or certain patterns can occur in areas where cells are dividing quickly. That is why microcalcifications may lead to magnification views, short-interval follow-up, or biopsy.

What the report may include

A radiology report may describe calcifications as scattered, grouped, linear, branching, coarse, punctate, or suspicious. These words help the radiologist decide the BI-RADS category and follow-up plan.

What to ask next

Ask whether the calcifications are new or stable, whether older mammograms were compared, what BI-RADS category was assigned, and what the recommended next step is. Those details matter more than the word 'calcification' alone.

Words to know

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Common questions

Are breast calcifications cancer?

Usually not. Many calcifications are benign. Some microcalcification patterns can be suspicious and may need more testing.

Can I feel calcifications?

No. NCI notes that breast calcifications are seen on a mammogram but cannot be detected by touch.

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How this page was created

Cancer Explained uses AI to organize and translate information from the authoritative sources cited on each page. Automated checks review claims, citations, clarity, duplication, and potential safety concerns before publication. Our content is not currently reviewed by physicians unless a specific qualified reviewer is named on the page. Cancer Explained provides general education and should not replace advice from your healthcare team.

Editorial status: Source verified This page was created with AI assistance and checked against the sources listed on it. Source checking is not a medical review.

Human medical review: not completed. At this time, most Cancer Explained content has not been reviewed by a physician or other healthcare professional. Pages with documented human medical review identify the reviewer, credentials, and review date directly.

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What Does Calcification Mean on a Mammogram?