Confirmation of Primary Hyperparathyroidism

Diagnostic Approach

• The American College of Radiology states that the diagnosis of primary hyperparathyroidism is biochemical, not radiological, and imaging has no role in confirming or excluding the diagnosis 2, 1
• The American College of Cardiology recommends that serum calcium measurement combined with PTH level is the definitive test for confirming primary hyperparathyroidism 3

Key Biochemical Tests for Confirmation

• Elevated or high-normal serum calcium with concurrent elevated or inappropriately normal PTH levels is a key biochemical test for confirming primary hyperparathyroidism 3

Important Clinical Considerations

• Biochemical confirmation should always precede any imaging studies, according to clinical guidelines from Praxis Medical Insights 1
• Imaging studies, such as ultrasound or sestamibi scans, are used only for preoperative localization after biochemical confirmation, not for diagnosis, as recommended by the American College of Radiology and Praxis Medical Insights 2, 1

Common Pitfalls to Avoid

• Relying on imaging studies to make the diagnosis is incorrect, as imaging has no role in confirming or excluding the diagnosis, according to Praxis Medical Insights 1
• Failing to measure both calcium and PTH simultaneously is a common pitfall, as both are required for proper diagnosis, as recommended by the American College of Cardiology 3