Hypothesis: Most patients undergoing long-term dialysis are anemic because of underproduction of erythropoietin and its inhibition by high parathyroid hormone levels due to secondary hyperparathyroidism. Renal anemia can be improved by parathyroidectomy.
Design: Retrospective cohort study.
Setting: Regional hospital.
Patients: Twenty-three Chinese patients without a previous functioning renal transplant underwent parathyroidectomy for severe secondary hyperparathyroidism in a 3-year period.
Intervention: Total parathyroidectomy with or without parathyroid autograft at the forearm.
Main Outcome Measures: The preoperative and 6-month postoperative hematological and biochemical variables were compared for any differences by means of a paired t test.
Results: The mean +/- SD follow-up duration was 17.7 +/- 8.1 (range, 6-34) months. Three patients (13%) developed persistent or recurrent hyperparathyroidism and 2 patients (9%) were biochemically hypoparathyroid. The other 18 patients (78%) were euparathyroid. Surgical morbidity was minimal; only 1 patient had complications, consisting of a postoperative fever of unknown origin that resolved with conservative treatment. The mean +/- SD hemoglobin level (8.6 +/- 2.1 vs 9.4 +/- 2.1 g/dL) but not the mean platelet level was significantly (P = .04) increased 6 months postoperatively. Likewise, the following other mean +/- SD biochemical values improved after surgery: parathyroid hormone (2235 +/- 500 vs 151 +/- 312 pg/mL; P<.001), alkaline phosphatase (645 +/- 349 vs 123 +/- 82 U/L; P<.001), calcium (10.8 +/- 4.0 vs 9.3 +/- 1.0 mg/dL; P<.001), phosphate (1.93 +/- 0.73 vs 1.50 +/- 0.51 mmol/L; P = .02), and albumin (3.5 +/- 0.5 vs 3.8 +/- 0.6 g/dL; P = .006).
Conclusions: Parathyroidectomy is highly effective to control secondary hyperparathyroidism with an exceedingly low complication rate. The hemoglobin level was significantly elevated 6 months postoperatively. The long-term effect warrants future trials.
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