Parathyroidectomy in Persistent Post-transplantation Hyperparathyroidism - Single-center Experience.

Area of Science:

• Nephrology
• Endocrinology
• Surgical Sciences

Background:

• Persistent hyperparathyroidism affects up to 25% of kidney transplant recipients.
• Standard treatments like vitamin D analogues can worsen hypercalcemia, and cinacalcet is not approved for this population.
• Parathyroidectomy is a potential surgical solution for managing persistent hyperparathyroidism post-transplant.

Purpose of the Study:

• To evaluate the long-term effects of parathyroidectomy on mineral metabolism (calcium, phosphorus, PTH) in kidney transplant patients.
• To assess the impact of parathyroidectomy on allograft function in this patient cohort.

Main Methods:

• Retrospective analysis of 15 kidney transplant patients who underwent parathyroidectomy between 2005 and 2015.
• Data collected included pre- and post-operative levels of intact parathyroid hormone (PTH), calcium, and phosphorus.
• Surgical approaches included uniglandular, biglandular, and subtotal parathyroidectomy; no surgery-related mortality was reported.

Main Results:

• One year post-surgery, significant decreases in PTH (P=.001) and normalization of serum calcium (P=.04) were observed.
• Phosphorus levels showed a trend towards increase (P=.05), and calcium levels normalized by the end of follow-up.
• A transient decrease in estimated glomerular filtration rate (eGFR) occurred one month post-surgery, but eGFR returned to baseline levels within one year.

Conclusions:

• Parathyroidectomy is a safe and effective procedure for kidney transplant patients with persistent hyperparathyroidism.
• The surgery leads to significant improvements in mineral metabolism and normalization of calcium levels.
• Despite a temporary decline, allograft function is not compromised in the long term following parathyroidectomy.