Quick Facts
- Sample: Blood
- Fasting: No special preparation is required.
- Turnaround: 5-10 business days. May take longer based on weather, holiday, or lab delays.
What This Test Measures
This test measures the level of Parathyroid Hormone-Related Peptide (PTH-RP) in your blood. PTH-RP is a peptide that, when elevated, is most commonly associated with certain cancers and can cause hypercalcemia (high blood calcium) through a mechanism separate from typical parathyroid hormone (PTH) regulation.
Your result reflects the directly measured amount of PTH-RP present in your blood sample. This is distinct from calcium, phosphorus, vitamin D, or standard PTH levels, none of which are measured by this test. The result may help your healthcare provider investigate the cause of abnormal calcium levels.
Benefits
- Measures PTH-RP, a peptide linked to certain cancer-related calcium imbalances
- Supports investigation into the cause of hypercalcemia
- Provides information useful for monitoring certain kidney or parathyroid conditions
- Uses a straightforward blood sample with no special preparation
- Delivers results your provider can use alongside other clinical findings
Who Is This Test For?
- Individuals experiencing symptoms associated with hypercalcemia
- People whose provider is investigating an unexplained high calcium level
- Individuals with a cancer diagnosis being evaluated for related calcium changes
- People with kidney disease whose calcium levels are being monitored
- Individuals with hyperparathyroidism being followed by their provider
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What is the purpose of this test?
This test measures Parathyroid Hormone-Related Peptide (PTH-RP) in the blood. It may help a healthcare provider investigate the cause of abnormally high blood calcium (hypercalcemia), as elevated PTH-RP is often associated with certain cancers. This test does not diagnose a specific condition on its own.
2. When might I consider ordering this test?
You may consider this test if you have symptoms associated with hypercalcemia, such as nausea, fatigue, muscle weakness, confusion, or bone pain. It may also be relevant when a provider is investigating an unexplained high calcium level, evaluating calcium-related changes in someone with cancer, or monitoring a kidney or parathyroid condition.
3. What does this test measure?
This test directly measures the concentration of PTH-RP in a blood sample. It does not measure calcium, phosphorus, vitamin D, or standard parathyroid hormone (PTH) levels. The result reflects PTH-RP only.
4. Do I need to fast or prepare before this test?
No special preparation is required.
5. How quickly will I get results?
Results are typically available in 5–10 business days. Weather, holidays, or laboratory delays may extend this timeframe.
6. How do I interpret the results?
The meaning of your PTH-RP result depends on your symptoms, medical history, other laboratory findings, and overall clinical context. An elevated result does not automatically confirm a specific condition, and a normal result does not rule one out. Your provider may consider this result alongside calcium levels and other relevant testing.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
7. What should I do if my result is outside the expected range?
Review your result with a qualified healthcare provider. They can interpret it in the context of your symptoms and health history and determine whether further evaluation or testing is appropriate.
8. How often should I get tested?
Testing frequency depends on your health needs and reason for testing. Follow your healthcare provider’s guidance, as there is no standard repeat-testing schedule for this test.
Pre test preparation
No special preparation is required.
