Recurrence of autonomous hyperparathyroidism in calcium nephrolithiasis

Area of Science:

• Nephrology
• Endocrinology
• Urology

Background:

• Calcium nephrolithiasis and hypercalciuria are common conditions.
• Primary hyperparathyroidism can cause hypercalcemia and kidney stones.

Observation:

• A patient with recurrent calcium nephrolithiasis and hypercalciuria developed hypercalcemia, treated with parathyroid surgery.
• Post-surgery, the patient remained hypercalciuric despite dietary changes, leading to recurrent kidney stones.
• Recurrent hypercalcemia 4-6 years later required a second surgery, yet hypercalciuria persisted.

Findings:

• Evidence of a "renal calcium leak" hypercalciuria was identified.
• Thiazide administration effectively normalized urinary calcium excretion.

Implications:

• Persistent hypercalciuria, even after parathyroidectomy, can lead to recurrent kidney stones.
• This case highlights the potential for recurrent hyperparathyroidism in patients with persistent hypercalciuria.
• Thiazide diuretics may be a valuable treatment for managing hypercalciuria in specific patient populations.