Serum lipoprotein disturbances in primary and secondary hyperparathyroidism and effects of parathyroidectomy.

Serum lipoprotein disturbances were studied in 86 patients with primary (I), and 34 hemodialysis patients with severe secondary (II), hyperparathyroidism (HPTH) before and seven to 14 days after parathyroidectomy (PTx). In addition, a subset of patients had repeat studies more than 12 months after PTx. In patients with I as well as with II HPTH, mean +/- SEM fasting serum concentrations of total triglycerides (TG) (1.51 +/- 0.09 and 2.17 +/- 0.19 mmol/L, respectively) were significantly increased when compared with that of 22 age- and sex-matched healthy control subjects (1.01 +/- 0.09 mmol/L, P less than .001). No consistent anomalies of serum total cholesterol and lipoprotein cholesterol content were observed in Io HPTH patients. In uremic II HPTH patients, the cholesterol content of high-density lipoprotein (HDL) was significantly (P less than .01) depressed, compared with normal subjects. In the short term, PTx normalized serum total TGs (P less than .001) in Io HPTH patients from 1.50 +/- 0.11 to 1.19 +/- 0.07 mmol/L seven days after PTx. The surgical correction of II HPTH in dialysis patients was also followed by an improvement of hypertriglyceridemia from 2.22 +/- 0.21 to 1.46 +/- 0.08 mmol/L and 1.46 +/- 0.09 mmol/L seven and 14 days, respectively, after PTx (P less than .01). Long-term follow-up after PTx shows clearly a persistent decrease in serum TG concentration in I HPTH patients (1.17 +/- 0.11 mmol/L), as well as in II HPTH patients (1.61 +/- 0.18 mmol/L), 12 months after PTx by comparison with values determined before PTx.(ABSTRACT TRUNCATED AT 250 WORDS)