Why is HE4 (Human Epididymis Protein 4) High? Causes, Symptoms, and What to Do

Human epididymis protein 4 (HE4) is a marker often used in conjunction with other tests to assess the risk of ovarian cancer. Understanding why HE4 levels might be elevated is important for interpreting lab results and deciding on next steps for your health.

What is HE4 and why is it important?

HE4, or human epididymis protein 4, is a protein that can be measured in the blood. It is often used alongside CA-125, another marker, to evaluate the risk of ovarian cancer, particularly when there is an ovarian mass. This combination is known as the Risk of Ovarian Malignancy Algorithm (ROMA) score. HE4 is not used as a standalone screening tool but can provide valuable information when assessing potential cancer risks.

Causes of elevated HE4 levels

Elevated HE4 levels can occur for a variety of reasons. While a primary concern is the association with ovarian cancer, high HE4 levels can also be due to other factors such as:

• Menopausal status: Women who are postmenopausal may naturally have higher HE4 levels.
• Other medical conditions: Certain benign conditions, especially renal (kidney) disease, can also cause elevated HE4 levels.
• Physiological variations: Age and menstrual cycle phases can influence HE4 levels.

Understanding HE4 levels in context

There is no single normal range for HE4 levels; it can vary based on several factors:

• For premenopausal women, levels are usually below approximately 70 pmol/L, while for postmenopausal women the usual upper limit is around 140 pmol/L.
• For postmenopausal women, levels may be higher, reflecting natural physiological changes.

It is crucial to interpret HE4 levels alongside other tests and clinical findings, as recommended by a healthcare provider.

Symptoms associated with high HE4 levels

Elevated HE4 levels themselves do not cause symptoms. However, if the increase is due to an underlying condition, symptoms may vary depending on the specific issue, such as:

• Ovarian cancer: Symptoms might include abdominal bloating, pelvic pain, and changes in bowel habits.
• Other conditions: Symptoms related to kidney disease might be present.

Frequently asked questions

What should I do if my HE4 levels are high?

If your HE4 levels are high, it's important to discuss these results with your healthcare provider. They will consider your overall health, symptoms, and other test results to determine the next steps.

Can high HE4 levels be reduced?

HE4 levels themselves are not typically targeted for treatment. Instead, addressing the underlying condition causing the elevation is the focus.

Is a high HE4 level a definite sign of cancer?

No, a high HE4 level is not a definitive sign of cancer. It is one piece of information that needs to be interpreted in the context of other tests and clinical evaluations.

How is HE4 measured?

HE4 is measured through a blood test. The result can help assess the risk of ovarian cancer when used with other markers like CA-125.

When to see a doctor

You should consult a doctor if you receive a high HE4 test result, especially if you experience symptoms like persistent abdominal pain, bloating, or other concerning changes in your health. Your healthcare provider can help determine the cause of the elevated levels and advise on appropriate next steps.

Remember, this information is meant to provide an understanding of HE4 levels and is not a substitute for professional medical advice. Always discuss your lab results and health concerns with your clinician.