Abstract: A 63yearold woman presented with belching, constipation， lower extremities weakness and arthralgia. Laboratory tests showed hypercalcemia, elevated serum creatinine and parathyroid hormone. Urine analysis did not find proteinuria or hematuria. Kidney ultrasound demonstrated bilateral kidney crystal. Renal biopsy showed chronic interstitial nephritis and nephrocalcinosis. Parathyroidectomy was then performed and pathological examination indicated parathyroid adenoma. The final diagnosis was parathyroid adenoma and primary hyperparathyroidism associated kidney calcinosis.

Key words: hyperparathyroidism, chronic interstitial nephritis, nephrocalcinosis, renal biopsy