Normocalcemic Hyperparathyroidism Facebook Live

In today’s Parathyroid Education Course, Dr. Deva Boone (Southwest Parathyroid Center) explains Normocalcemic Hyperparathyroidism, one of the most confusing parathyroid topics for patients (and often doctors). We break down the true definition, why many people are mislabeled, and how to tell whether “normocalcemic hyperparathyroidism” is actually secondary, primary, or even tertiary hyperparathyroidism. What “normocalcemic hyperparathyroidism” really means - Normocalcemic = normal blood calcium - Hyperparathyroidism = high PTH (overactive parathyroid glands) - The diagnosis requires: normal calcium + high PTH Most important takeaway - If your calcium is outside the true normal range, you do not have normocalcemic hyperparathyroidism. - “Normal” on the lab slip is often too broad and can be misleading. Common misdiagnoses Dr. Boone sees - Low/low-normal calcium (high 8s–low 9s) + high PTH → usually secondary hyperparathyroidism (calcium intake/absorption problem) - Calcium in the low 10s (especially age over 40) + high PTH → often classic primary hyperparathyroidism - True normal calcium (typically mid/high 9s) + high PTH → can be true normocalcemic hyperparathyroidism (primary or secondary—must work it up) Why you can’t diagnose this from one lab draw - Calcium can “bounce” in early primary hyperparathyroidism (high → normal → high). - True normocalcemic hyperparathyroidism requires calcium to be consistently normal over time. - Old labs matter—they often reveal the correct diagnosis. How Dr. Boone evaluates these cases (the workup) - To determine primary vs secondary, she reviews: Bowel habits (chronic diarrhea / malabsorption) Diet patterns (low calcium intake, vegan diet, high-oxalate foods like spinach) Supplements (calcium + vitamin D dosing) Surgical history (especially gastric bypass and other malabsorption surgeries) 24-hour urine calcium (renal calcium leak vs calcium conservation) Prior calcium and PTH trends over several years Real patient-style cases (and what they mean) Treatment overview - Primary normocalcemic hyperparathyroidism → often surgery - Secondary hyperparathyroidism → treat the cause (calcium/vitamin D optimization, malabsorption issues, renal calcium leak treatment, etc.) - Tertiary hyperparathyroidism → typically surgery Key takeaways - Normocalcemic = truly normal calcium - The lab “normal range” may not reflect the true physiologic normal - Normocalcemic hyperparathyroidism can be primary or secondary - You often need multiple labs over time + urine calcium + clinical context to diagnose correctly Disclaimer: This video is for education only and is not personal medical advice. Always discuss your specific labs and symptoms with your physician.