Inflammatory breast cancer (IBC) is a rare but extremely aggressive form of breast cancer that you may not know about — but you should. With IBC, cancer cells block the lymph vessels in the skin of the breast, causing it to appear inflamed. IBC accounts for 1 to 5 percent of all breast cancer cases in the United States, and it tends to be diagnosed in younger women compared with non-IBC breast cancer, as well as more frequently in African-American than Caucasian women. It's important to be informed about this disease, so read on.

What are the symptoms of IBC?

The skin of the breast may appear red, pink or purple, bruised, with ridges or pits like the skin of an orange, caused by a buildup of fluid and swelling. The breast may feel swollen, hot or warm, heavy, achy and tender; it may even increase in size, or the nipple could invert, facing inward. With IBC, swollen lymph nodes may also be present under the arm or above the collarbone. Symptoms occur often without a distinct lump in the breast, and they usually develop quickly — over weeks or months.

How is IBC diagnosed?

It's primarily discovered in the results of a doctor's clinical exam. Biopsy, mammogram and breast ultrasound are used to confirm the diagnosis. IBC is classified as either stage IIIB (locally advanced) or stage IV breast cancer (spread to other organs).

How is IBC initially treated?

Chemotherapy is generally the first treatment in order to control or kill cancer cells, including those that may have spread elsewhere. After chemo, IBC patients may undergo surgery (to remove the tumor) and radiation therapy (to destroy remaining cancer cells) to the chest wall. Both are local treatments, affecting only cells in the tumor and the immediate surrounding area.

What about follow-up treatment?

Additional chemotherapy, hormonal therapy (treatment that interferes with the effects of the female hormone estrogen, which can promote the growth of breast cancer cells), targeted therapy (such as the medication trastuzumab, also known as Herceptin), or all three can be used to reduce the risk of a recurrence.

Are clinical trials available for IBC patients?

Yes. Those interested should first talk with their doctor. Information about clinical trials is available from the NCI's Cancer Information Service at 800-4-CANCER, in the NCI booklet Taking Part in Clinical Trials or at the National Cancer Institute website.

What is the prognosis for those with IBC?

IBC is more likely to have metastasized (spread to other body areas) by the time of diagnosis than non-IBC cases. As a result, the five-year survival rate for IBC patients is between 25 and 50 percent — significantly lower than the survival rate for patients with non-IBC breast cancer. But these statistics are averages based on large numbers of patients and cannot be used to predict a particular patient's outcome. Patients should consult their doctor about their specific prognosis.

Learn more about IBC at the National Cancer Institute.