Understanding Lab Tests for Familial Isolated Hyperparathyroidism
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Familial Isolated Hyperparathyroidism (FIHP) is a hereditary condition characterized by overactive parathyroid glands that produce excessive amounts of parathyroid hormone (PTH). This leads to elevated calcium levels in the blood and can cause various health complications if left untreated.
Recommended Test
Parathyroid Hormone (PTH), Intact
This test directly measures the levels of intact parathyroid hormone in the blood. In familial isolated hyperparathyroidism, individuals have enlarged parathyroid glands that produce excessive PTH, leading to elevated hormone levels and subsequently high blood calcium. This test is fundamental for confirming the diagnosis and monitoring the severity of the condition.
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Diagnosing Familial Isolated Hyperparathyroidism
The diagnosis of FIHP relies primarily on blood tests that measure hormone levels and calcium metabolism. Since this condition directly affects parathyroid hormone production, measuring PTH levels is the cornerstone of diagnosis, especially when combined with family history and genetic predisposition.
Understanding the Results
Elevated PTH levels, particularly when accompanied by high blood calcium levels and a family history of similar conditions, strongly suggest familial isolated hyperparathyroidism. The test results help healthcare providers determine the appropriate treatment approach and monitor the condition's progression over time.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment. Genetic counseling may also be recommended for individuals with a family history of this hereditary condition.
