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[Two cases of hypercalcemic nephropathy associated with primary hyperparathyroidism]
T Kashitani1, H Makino, Y Nagake
1Third Department of Internal Medicine, Okayama University Medical School, Japan.
Nihon Jinzo Gakkai Shi
|October 1, 1993
Summary
Primary hyperparathyroidism can cause hypercalcemic nephropathy, leading to kidney dysfunction. Prompt diagnosis and treatment are crucial for managing kidney damage in these patients.
Area of Science:
- Nephrology
- Endocrinology
- Pathology
Background:
- Primary hyperparathyroidism is a condition characterized by excessive parathyroid hormone production.
- Hypercalcemia, a hallmark of this condition, can lead to various systemic complications, including renal impairment.
Observation:
- Two cases of hypercalcemic nephropathy in young men associated with primary hyperparathyroidism are presented.
- One case involved a 37-year-old man with fractures and stones, while the other, a 35-year-old, had parathyroid carcinoma presenting with nephrogenic diabetes insipidus.
Findings:
- Both patients exhibited mild renal dysfunction. Renal biopsies revealed chronic inflammation, tubular damage (necrosis), calcium deposition in tubular mitochondria, and glomerular sclerosis.
- Histological findings were more advanced in the patient with parathyroid carcinoma, with significant tubular atrophy and necrosis.
Implications:
- Severe hypercalcemia, particularly from primary hyperparathyroidism, can induce significant tubular dysfunction and pathological changes in the kidneys.
- Successful treatment, such as parathyroidectomy, can ameliorate hypercalcemia and improve renal function, highlighting the importance of early intervention.