Pseudo-angiomatous Stromal Hyperplasia

What it is

Pseudo-angiomatous stromal hyperplasia, or PASH, is a benign condition where normal supportive tissue in the breast grows more than usual. The name sounds complicated, but it just describes how the cells look under a microscope. PASH is not harmful and is a very common finding.

How common it is

PASH is an uncommon but benign finding. It is often discovered by chance when a breast biopsy is done for another reason.

What you may notice

Most of the time, PASH causes no symptoms at all. If it does cause symptoms, you might feel a single, firm lump that you can move, or you might have some breast pain or tenderness.

What can contribute

The exact cause of PASH is not fully understood. It appears to be related to your body's natural hormones, like progesterone.

How it is usually checked

PASH is usually diagnosed with a breast biopsy, which is when a tiny piece of tissue is removed for a specialist to look at. Often, it is found incidentally on a biopsy report. If PASH forms a lump, your provider may suggest imaging like a mammogram or ultrasound.

Does this change my long-term risk?

This is a benign condition. Finding PASH does not change your long-term breast health risk and is not a cause for concern.

Comfort and everyday care

• A supportive, comfortable bra can help ease discomfort from any lump or general tenderness.
• Some women find that using a warm compress on the breast helps to soothe soreness.
• Some women find that limiting caffeine in their diet helps reduce overall breast pain and tenderness.

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.