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Inflammatory breast cancer (IBC)

Inflammatory breast cancer moves fast, and so does its treatment. If you or someone you love was just diagnosed, know that there's a clear plan and a team ready to start.

ℹ️ General information to help you and your loved ones talk with your care team, not medical advice. Read our disclaimer.

The quick guide

What it means: Cancer cells block the lymph vessels in the skin of the breast, causing redness, swelling, warmth and skin that looks like an orange peel. It's always at least stage III.

How it's found: Diagnosed by an exam plus a biopsy of the breast (and often the skin). ER, PR and HER2 are tested like any breast cancer.

How common it is: Rare: about 1 to 5% of breast cancers.

How treatment works

🌱 Early-stage

Treatment usually starts with chemo (plus HER2 drugs if HER2-positive) before surgery.
Then a modified radical mastectomy (not lumpectomy) and radiation to the chest wall and nodes.
Hormone therapy or more HER2 treatment afterward, depending on the type.

🔁 Advanced or metastatic

If it has spread, treatment follows the metastatic breast cancer plan for its subtype (HR+, HER2+ or triple-negative).

Approvals depend on stage and prior treatment. Your care team will decide what fits you.

Drug guides

Biomarker tests that matter

Side effects you may notice

❓ Questions you and your loved ones can ask

Will I get chemo before surgery?
Is my IBC HER2-positive or hormone receptor-positive?
Is there a clinical trial for IBC?

Back to Breast cancer overview. Other types: Hormone receptor-positive (HR+/HER2-) breast cancer, HER2-positive breast cancer (and HER2-low), Triple-negative breast cancer (TNBC), Ductal carcinoma in situ (DCIS, stage 0).

Written by the Cancer Side Effects Guide team from FDA labels and leading cancer centers. Not medical advice. · Last updated: October 15, 2026 · How we write

Not medical advice. This page is general information to help you talk with your care team. It can't replace advice from your doctor or nurse. If you have a fever of 100.4°F (38°C) or higher during treatment, or any symptom that worries you, call your care team now. In an emergency, call 911.