Mast Cell Hyperplasia

What it is

Mast cell hyperplasia means there is a higher than usual number of mast cells in a sample of your breast tissue. Mast cells are a normal part of your immune system that can be involved in inflammation and allergic reactions. This finding is benign, meaning it is not a health risk on its own.

How common it is

This is an uncommon finding in breast tissue samples.

What you may notice

Many women do not notice any symptoms, and it is found by chance. If you do have symptoms, you may feel breast pain, tenderness, or notice some swelling or redness in the area.

What can contribute

The exact cause is not well understood. It seems to be related to how your body's immune system responds in that area of the breast.

How it is usually checked

Mast cell hyperplasia is usually found when a pathologist looks at breast tissue under a microscope after a biopsy. Your provider may also suggest imaging, like a mammogram or ultrasound, to check the area, especially if you have symptoms.

Does this change my long-term risk?

This finding is benign and is not thought to change your long-term breast health risk. Your provider will consider it along with all your other health information.

Comfort and everyday care

• A supportive, comfortable bra may help ease any soreness or swelling.
• Some women find that managing stress through activities like meditation, yoga, or gentle exercise helps them feel better overall.
• Applying a warm compress to the area for 10 to 15 minutes may provide some comfort.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.