The Case | Hypercalcemia in a 60-year-old male

Hypercalcemia (3.0mmol/l), elevated parathyroid hormone concentrations (PTH, C-assay, 49pg/ml), and hypercalciuria (10.0mmol/24h) were found in 1983 in a 31-year-old male, who at that time presented with kidney stones and moderate nephrocalcinosis. Given the combination of high serum calcium along with elevated PTH, primary hyperparathyroidism was diagnosed, and the patient underwent partial parathyroidectomy in 1984 (histology … Leggi tutto

Chronic hypercalcaemia from inactivating mutations of vitamin D 24-hydroxylase (CYP24A1): implications for mineral metabolism changes in chronic renal failure

Loss-of-function mutations of vitamin D-24 hydroxylase have recently been recognized as a cause of hypercalcaemia and nephrocalcinosis/nephrolithiasis in infants and adults. True prevalence and natural history of this condition are still to be defined.  … Probands had recurrent nephrolithiasis, chronic hypercalcaemia with depressed parathyroid hormone (PTH) and increased 1,25(OH)2D levels; carriers had nephrolithiasis (two of … Leggi tutto

Kidney Stone Academy

Un corso on line, oramai non più FAD, sulla Fisiopatologia della Calcolosi Renale. GLi AA sono la sicurezza che il corso vale assolutamente la pena di essere visto. https://medicalfree.it/corso/fisiopatologia-della-calcolosi-renale Marco Lombardi

Persistent Hyperparathyroidism: A Reality Calling for Additional Evidence

Editoriale AJKD Vol XX | Iss XX | Month 2022 In this issue of AJKD, Wang et al1 report on the incidence, trends, and consequences of treatment of posttransplant hyperparathyroidism in a nationwide registry encompassing 30,127 Medicare-insured US patients who received a first kidney transplant. …In clinical practice, we want to identify patients with negative … Leggi tutto

2 – Nephrocalcinosis and urolithiasis in children Kidney International (2012) 82, 493–497; doi:10.1038/ki.2012.142

Correction to: Kidney International (2011) 80:1278–1291; doi:10.1038/ki.2011.336 In the above-cited article, Table 2 was published with incorrect alignment of age ranges and erroneous unit changes concerning the cystine and urate excretion levels. The urate gram units needed to be multiplied by 10. In Table 1, the diagnosis related to NPT2a mutations should read ‘Urolithiasis, osteoporosis, … Leggi tutto

Hyperparathyroidism complicating CYP 24A1 mutations

CYP24A1 gene mutations induce infantile hypercalcemia, with high 1,25(OH)2D contrasting with low PTH levels. The adult phenotype is not well known. Two unrelated adult patients were referred for nephrolithiasis, hypertension, hypercalcemia, hypercalciuria, normal 25-OHD levels, and inappropriate PTH levels (22 to 92 pg/mL; N: 15–68) suggesting primary hyperparathyroidism, leading to surgery. Hypercalciuria improved despite persistent … Leggi tutto

Therapy‑Resistant Hypercalcemia in a Patient with Inactivating CYP24A1 Mutation and Recurrent Nephrolithiasis: Beware of Concomitant Hyperparathyroidism

We describe a case harboring a homozygous CYP24A1 mutation with mild loss of function, frst presenting with recurrent nephrolithiasis from the age of 22 onward, initially associated with hypercalcemia and low PTH concentrations. Over the years, hyperparathyroidism developed, resulting in more severe hypercalcemia. Also, kidney function deteriorated, most probably as a consequence of biopsy-proven nephrocalcinosis. … Leggi tutto

Metabolic Evaluation and Recurrence Prevention for Urinary Stone Patients: EAU Guidelines

Context: An optimum metabolic evaluation strategy for urinary stone patients has not been clearly defined. Objective: To evaluate the optimum strategy for metabolic stone evaluation and management to prevent recurrent urinary stones. Evidence acquisition: Several databases were searched to identify studies on the metabolic evaluation and prevention of stone recurrence in urolithiasis patients. Special interest … Leggi tutto

Meeting report of the “Symposium on kidney stones and mineral metabolism: calcium kidney stones in 2017”

A symposium on kidney stones and mineral metabolism held on December 2017 in Brussels, Belgium was the first international multidisciplinary conference of the International Collaborative Network on Kidney Stones and Mineral Metabolism. This meeting addressed epidemiology, underlying pathophysiological mechanisms, genetics, pathological, as well as clinical and research topics. The participants included clinicians and recognized experts … Leggi tutto