Understanding HE4: What Your Blood Test Result Means and When It Matters
Learn about HE4, its role in assessing ovarian cancer risk, and how to interpret your test results.
Human epididymis protein 4 (HE4) is a marker used in blood tests to help assess the risk of ovarian cancer. Understanding your HE4 test result is important, especially if you are being evaluated for an ovarian mass. This article explains what HE4 is, why it matters, and when you should discuss your results with a healthcare provider.
What is HE4?
HE4, or human epididymis protein 4, is a protein that can be measured in the blood. It is often used alongside another marker called CA-125 to calculate the Risk of Ovarian Malignancy Algorithm (ROMA) score. This score helps determine the likelihood that an ovarian mass is cancerous. HE4 is not used as a stand-alone screening tool for ovarian cancer but is valuable in conjunction with other tests.
Why HE4 Matters
HE4 is significant because it assists in the evaluation of ovarian cancer risk. Its levels can vary depending on factors such as menopausal status. For instance, a commonly used upper limit is about 70 pmol/L before menopause and about 140 pmol/L after menopause, although cutoffs depend on the assay. This variability underscores the importance of considering HE4 results in the context of other clinical findings and tests.
Factors Affecting HE4 Levels
Several factors can influence HE4 levels, including age, menopausal status, and the specific assay used to measure the protein. It's crucial to interpret HE4 results carefully, as there is no single reference range that applies to all individuals. Your healthcare provider will consider these factors when evaluating your HE4 levels.
Interpreting Your HE4 Test Result
Interpreting HE4 results involves understanding the context of the test. HE4 levels are used with CA-125 levels to calculate the ROMA score, which assesses the risk of ovarian cancer. If your HE4 levels are outside the expected range for your menopausal status or if the ROMA score indicates an increased risk, your healthcare provider may recommend further evaluation.
Frequently asked questions
What is a normal HE4 level?
There is no single normal HE4 level: a commonly used upper limit is about 70 pmol/L before menopause and about 140 pmol/L after menopause, and cutoffs depend on the assay and other factors. Your healthcare provider will interpret your level in context.
Can HE4 levels be elevated for reasons other than cancer?
Yes, HE4 levels can be influenced by non-cancerous conditions. It's essential to consider HE4 results alongside other clinical findings.
How is HE4 used in conjunction with CA-125?
HE4 and CA-125 are used together to calculate the ROMA score, which helps assess the risk of ovarian cancer.
Is HE4 a screening test for ovarian cancer?
No, HE4 is not used as a stand-alone screening test for ovarian cancer. It is used in combination with other tests to evaluate risk.
What should I do if my HE4 levels are high?
If your HE4 levels are high, discuss the results with your healthcare provider to understand the implications and next steps.
When to see a doctor
If you receive an HE4 test result that is outside the expected range for your specific circumstances, or if you have an ovarian mass, it is important to consult with your healthcare provider. They can help interpret the results in the context of your overall health and any symptoms you may be experiencing.
This information is for educational purposes only. Always discuss your health decisions with your healthcare provider.