Elevated Serum Intact Parathyroid Hormone Research Articles

Pathological fractures in teen and middle age women with primary hyperparathyroidism

Primary hyperparathyroidism (PHPT) is a disease commonly seen in postmenopausal women. We report two cases of pathological fractures following trivial injuries in two different age groups; the middle and teen age group presented as PHPT due to parathyroid adenoma. PHPT usually presents with symptomatic hypercalcemia and target organ damage. Biochemical manifestations in both cases are similar i.e. hypercalcemia, elevated serum intact parathyroid hormone (iPTH), and mass in the parathyroid gland. Histopathological examination is consistent with parathyroid adenoma. We highlighted these two cases due to long delay before the PHPT diagnosisisconfirmedbecause of various investigations commenced in these patients to rule out other diagnoses. Bangladesh Journal of Medical Science Vol. 22 No. 01 January’23 Page : 234-238

Elevated parathyroid hormone levels in older women treated for osteoporosis using denosumab.

Primary care physicians (PCPs) often struggle with elevated serum intact parathyroid hormone (iPTH) in osteoporotic patients on antiresorptive treatment, specifically, denosumab. As iPTH and calcium levels need to be within normal ranges to receive the next dose of denosumab, continuously high serum iPTH may necessitate additional tests to rule out pathological causes. We aimed to determine factors associated with iPTH elevation in a cohort of postmenopausal women receiving osteoporosis treatment. A cross-sectional analysis of electronic medical records of patients 50years and older who visited a geriatric osteoporosis clinic between October 1, 2014 and December 31, 2019, was conducted. We divided patients into 3 categories: not currently on treatment, on bisphosphonates or on denosumab. Percentage change in iPTH levels from baseline to 1year follow-up was the outcome measure. Other variables used are age, body mass index, chronic co-morbidities, 25OH-vitamin D, calcium, TSH, glomerular filtration rate and femoral neck BMD. Linear regression models were used to assess independent associations between treatment group and iPTH changes. Mean (SD) age of 173 participants in our study was 78 (± 10) years, and 71% were Caucasian. At follow-up, mean percent change of iPTH was 13.47 ± 62.76, 30.35 ± 61.17, and 39.60 ± 35.51 in the "no treatment", "bisphosphonate" and "denosumab" groups, respectively. Age was a predictor of elevated percent change of iPTH in the denosumab group. Increasing age is associated with iPTH elevations in osteoporotic patients on denosumab. In the absence of any pathology, continuation of denosumab may be safe in lowering fracture risk. However, a larger study may be required to confirm this.

Risk factors for calciphylaxis in Chinese hemodialysis patients: a matched case-control study

Introduction Calciphylaxis is a rare but potentially fatal disease commonly occurred in dialysis patients. Despite some previous studies on risk factors for calciphylaxis, there is still a lack of data from Chinese population. Methods The retrospective matched case–control study about calciphylaxis was performed in Zhongda Hospital affiliated to Southeast University. The case group involved 20 hemodialysis patients who were newly diagnosed with calciphylaxis from October 2017 to December 2018. The 40 noncalciphylaxis patients undergoing dialysis with the same age and duration of dialysis were randomly selected as controls. Results Most of calciphylaxis patients were male and elderly, while overweight people were more susceptible to the disease. Although incidence of secondary hyperparathyroidism was higher in calciphylaxis patients, the differences in duration of elevated serum intact parathyroid hormone (iPTH) and its highest value did not reach statistical significance compared with controls. No significant difference in warfarin therapy was discernible between two groups. The univariate regression analysis indicated that male, score of use of activated vitamin D and its analogues, corrected serum calcium level, serum phosphate, Ca × P product, iPTH, albumin, and alkaline phosphatase (ALP) level were significantly associated with calciphylaxis. Elevated levels of serum phosphate (OR 4.584, p = 0.027) and ALP (OR 1.179, p = 0.036), decreased level of serum albumin (OR 1.330, p = 0.013) were independent risk factors after multivariate analysis. Conclusion This is the first report of risk factors associated with calciphylaxis in China. Increased levels of serum phosphate and ALP, decreased level of serum albumin were vital high-risk factors for calciphylaxis in Chinese hemodialysis population.

P1406A CASE-CONTROL STUDY ON RISK FACTORS OF CALCIPHYLAXIS: DATA FROM CHINESE HEMODIALYSIS PATIENTS

Abstract Background and Aims Calciphylaxis (CUA) is a rare but potentially fatal disease that is commonly occurred in dialysis patients. Since there is no data based on Chinese population, the study is aimed to investigate risk factors of CUA in Chinese hemodialysis patients. Method We retrospectively evaluated medical records of 20 hemodialysis patients who were newly diagnosed with CUA by skin biopsy admitted to Zhongda Hospital Southeast University from Oct.2017 to Dec.2018. Non-CUA dialysis patients with the same age and duration of dialysis were randomly selected as controls (Ratio=1:2). Results Most of CUA patients were male (80%) and elderly (55%), while 50% had a body mass index higher than 24. The mean time interval since start of dialysis to CUA diagnosis was 114.65±81.32 months, and the median time from appearance of skin lesion to diagnosis was 6 (2, 15) months. The incidence of hyperparathyroidism was higher in patients with CUA (80% vs 62.5%), but the differences of duration of elevated serum intact parathyroid hormone (iPTH) and its highest value were not significant compared with the controls. Warfarin therapy had no significant difference between two groups (15% vs 5%). Univariate logistic regression analysis indicated that male (OR 3.619, 95%CI 1.027-12.748), each 1 point increase in score of use of vitamin D and its analogues (OR 1.505, 1.029-2.201), each 1 mmol/L increase in corrected serum calcium level (OR 24.486, 1.570-381.873), each 1 mmol/L increase in serum phosphate level (OR 5.382, 1.767-16.389), each 1 pg/mL increase in iPTH level (OR 1.002, 1.000-1.003), each 1 g/L decline in serum albumin level (OR 1.181, 1.041-1.340), each 1 IU/L increase in serum alkaline phosphatase (ALP) level (OR 1.005, 1.000-1.009) and each 1 mg/L increase in hypersensitive c-reactive protein level (OR 1.029, 1.000-1.059) were significantly associated with CUA. Serum phosphate, albumin and ALP were still significant risk factors after multivariate analysis. Conclusion This is the first report of risk factors of CUA based on Chinese population. The results show that high levels of serum phosphate and ALP, low level of serum albumin are independent risk factors of CUA in Chinese hemodialysis patients. Unlike previous research from western countries, warfarin therapy didn’t show an increased risk in this study, propably because of the low exposure rate of it in China.

Unusual recurrent renal secondary hyperparathyroidism caused by hyperplastic autograft with supernumerary parathyroid adenoma

Rationale:Secondary hyperparathyroidism (SHPT) is often complicated with chronic renal failure. Though the total parathyroidectomy (TPTX) with forearm autotransplantation (FAT) has been commonly used to treatment refractory renal SHPT, the recurrence of SHPT is not infrequent, resulting from hyperplastic autograft, remnant parathyroid tissues, and supernumerary parathyroid gland (SPG).Patient concerns:A 67-year-old man undergoing TPTX+FAT 4 years previously for renal SHPT, who received regular hemodialysis with active vitamin D supplements of Rocaltrol treatment postoperatively, was admitted to our hospital with progressively elevated serum intact parathyroid hormone (iPTH) from 176 to 1266 pg/mL for 8 months and bilateral ankle joints pain for 1 month. 99mTc-sestamibi dual-phase imaging with single positron emission tomography (SPECT)/computed tomography (CT) revealed a nodule in suprasternal fossa, besides a nodule in autografted site, accompanied with intense radioactivity.Diagnosis:Recurrent SHPT was easily diagnosed based on previous medical history, painful joints, increased serum iPTH level and positive findings of 99mTc-sestamibi imaging. Routine postoperative pathology showed that the nodules were consistent with an adenomatoid hyperplasic autograft and a supernumerary parathyroid adenoma in suprasternal fossa, respectively.Interventions:Reoperation for removing nodules in suprasternal fossa and autografted site was performed 1 month later. Then regular hemodialysis 3 times a week with Rocaltrol was continued.Outcomes:During 12 months of follow-up, the joints pain improved obviously and the serum iPTH level ranged from 30.1 to 442 pg/mL.Lessons:Although rare, recurrent renal SHPT may be caused by a coexistence of both hyperfunctional autograft and SPG after TPTX+FAT. The 99mTc-sestamibi parathyroid imaging with SPECT/CT is helpful to locate the culprits of recurrent renal SHPT before reoperation. To prevent recurrence of renal SHPT, the present initial surgical procedures should be further optimized in patient on permanent hemodialysis.

Nutritional rickets in Taiwanese children: Experiences at a single center.

The number of children with nutritional rickets in Taiwan has increased over the last decade. The aim of this study was to present our experiences in the management of patients with this condition. From 2011 to 2016, 10 children (3 boys and 7 girls) with nutritional rickets were enrolled in this study. Their clinical and biochemical data were analyzed. The median age of the 10 patients was 21 months (range, 12-25 months). The predisposing factors included exclusive breastfeeding, dietary restriction, and limited outdoor activities. The most common presentations were unsteady gait and bowlegs, and two patients had hypocalcemic seizures. All patients had elevated alkaline phosphatase levels (median, 1008U/L; range, 484-2051U/L), elevated serum intact parathyroid hormone levels (median, 333.8pg/mL; range, 130-817pg/mL), and hypophosphatemia (median, 3.0mg/dL; range, 2.4-3.9mg/dL). The median serum 25-hydroxyvitamin D level was 7.44ng/mL (range, 1.44-9.82ng/mL). After vitamin D supplementation was initiated, serum phosphorus levels normalized within 1 month, and serum intact parathyroid hormone levels returned to the normal range within 2 months. Six of the 10 patients had serum alkaline phosphatase levels close to the normal range within 3 months. All 10 patients exhibited complete bone healing within 6 months of vitamin D treatment. Nutritional rickets is not as rare in Taiwan as previously thought. When physicians encounter infants or toddlers with typical bone deformities or hypocalcemic seizures, a high index of suspicion and a detailed nutritional history are important for early diagnosis and treatment.

Elevated serum parathyroid hormone is a cardiovascular risk factor in moderate chronic kidney disease

Over 8% of adults in the United States are estimated to have moderate (stages 3 and 4) chronic kidney disease (CKD), which is increasingly recognized as one of the independent predictors for cardiovascular (CV) disease and related mortality. Secondary hyperparathyroidism with elevated serum intact parathyroid hormone (iPTH) is associated with increased CV mortality in end-stage renal disease and this relationship is unclear in moderate CKD. Medical records of 196 patients at Harry S. Truman Memorial Veterans Hospital with stages 3 and 4 CKD (glomerular filtration rate, GFR 16-59 ml/min/1.73 m(2)) who had iPTH levels determined from 4/2006 to 9/2007 were reviewed. CV event was defined as occurrence of any of the following during follow-up: myocardial infarction, stroke, coronary/carotid/peripheral artery revascularization, and death due to CV reasons. During median follow-up of 27.2 months, 48 patients had CV events, while 148 patients did not. iPTH was elevated (156.43 ± 107.49) for patients who had CV events compared with those without (109.12 ± 86.54, P = 0.003). Among the covariates studied in the multivariate analysis including history of vascular disease, 25-OH Vit D, corrected calcium, phosphorus levels, calcium-phosphorus product, and GFR, iPTH level was found to have a positive association with CV events during follow-up period (odds ratio = 1.3 for 50 pg/ml change in iPTH, 95% CI: 1.03-1.55, P = 0.02)). Cardiovascular disease history was the only other significant variable with estimated odds ratio of 5.9 (P = 0.002). iPTH level in patients with stages 3 and 4 CKD is associated with increased incidence of cardiovascular events independent of calcium-phosphorous level.

Incidence of Secondary Hyperparathyroidism among Postmenopausal Women with End-Stage Knee Osteoarthritis

To evaluate the incidence of secondary hyperparathyroidism (SH) among postmenopausal women with end-stage knee osteoarthritis scheduled for total knee replacement (TKR). 283 Caucasian postmenopausal women aged 49 to 81 (mean, 70) years with end-stage idiopathic knee osteoarthritis were scheduled to undergo primary TKR. They had been menopausal for 7 to 31 (mean, 19) years. Their preoperative serum levels of intact parathyroid hormone (I-PTH), calcium, phosphorus, creatinine, and the clearance of creatinine were evaluated. 100 patients had abnormally elevated serum I-PTH. The overall incidence of SH was 35%. Serum levels of calcium and phosphorus were elevated in 33 and 12 patients, respectively. The serum level of I-PTH correlated positively with patient age (r=0.158, p=0.008) and serum creatinine level (r=0.138, p=0.021) and negatively with clearance of creatinine (r= -0.169, p=0.004). SH is common among elderly postmenopausal women and may affect bone healing and implant fixation. Preoperative screening/evaluation of the serum PTH level in postmenopausal women scheduled for TKR is recommended.

Pakistani immigrant children and adults in Denmark have severely low vitamin D status

To determine vitamin D and bone status in adolescent girls, pre-menopausal women and men of Pakistani origin, to single out determinants of vitamin D status and to determine the association between vitamin D status, bone metabolism and bone status. Cross-sectional study, Copenhagen (55 degrees N), January-November. Serum 25-hydroxyvitamin D (S-25OHD), serum intact parathyroid hormone (S-iPTH), bone turnover markers and whole body and lumbar spine bone mineral density were measured. Sun, smoking and clothing habits, age, body mass index (BMI), and vitamin D and calcium from food and from supplements were recorded. Thirty-seven girls (median age, range: 12.2 years, 10.1-14.7), 115 women (36.2 years, 18.1-52.7) and 95 men (38.3 years, 17.9-63.5) of Pakistani origin (immigrants or descendants with Pakistani parents) took part in the study. Median concentration of S-25OHD was 10.9, 12.0 and 20.7 nmol/l for girls, women and men, respectively. Forty-seven per cent of the girls, 37% of the women and 24% of the men had elevated S-iPTH, and there was a negative relationship between S-iPTH and S-25OHD. Use of vitamin D-containing supplements had a positive association with S-25OHD for men (P=0.04) and women (P=0.0008). Twenty-one per cent of the women and 34% of the men had osteopenia. Neither S-25OHD nor S-iPTH was associated with lumbar spine or whole body bone mineral content. Severely low vitamin D status and elevated S-iPTH is common among Pakistani immigrants in Denmark. The low vitamin D status is not associated with bone markers or bone mass among relatively young Pakistanis.

Serum 25-hydroxyvitamin D levels and activities of daily living in noninstitutionalized elderly Japanese requiring care

To date, no study has investigated the nutritional status of vitamin D in frail elderly people living at home. The purposes of this study were to assess serum 25-hydroxyvitamin D (25[OH]D) levels and associated factors in noninstitutionalized elderly people who had various levels of physical disability, and to propose an adequate vitamin D nutritional status for the elderly by interpreting the serum 25(OH)D levels in relation to serum parathyroid hormone (PTH) levels in this population. Health examinations were conducted in the winter and summer of 2003. The subjects were 143 elderly people in the winter, and 120 elderly people in the summer, who all used the long-term care insurance system at home. Serum 25(OH)D concentrations were determined with a chemiluminescence protein-binding assay, and serum intact PTH concentrations were determined with an immunoradiometric assay. The subjects' disease histories and lifestyle information were obtained through an interview. Activities of daily living (ADL) levels were evaluated using the Barthel index, and grip strength was measured with a digital hand dynamometer. Average serum 25(OH)D levels in the winter and summer were 54.2 nmol/l (SD 29.0) and 53.3 nmol/l (SD 32.3), respectively, and intact PTH concentrations in the winter and summer were 4.2 pmol/l (SD 1.8) and 4.3 pmol/l (SD 1.8), respectively. The proportion of people who had a low 25(OH)D (<30 nmol/l) and high intact PTH levels (>6.9 pmol/l) were 15%-20% and 8%, respectively. Significant predictors of low serum 25(OH)D concentrations were low ADL levels, female sex, and low fish consumption in both seasons. Serum 25(OH)D concentrations of less than 50 nmol/l were associated with elevated serum intact PTH concentrations. In conclusion, elderly people requiring care at home are at high risk of hypovitaminosis D, and their low serum 25(OH)D levels are mainly associated with low ADL levels. In addition, maintenance of serum 25(OH)D concentrations above 50 nmol/l may prevent hypovitaminosis D-induced hyperparathyroidism.

Renal, thyroid and parathyroid function during lithium treatment: laboratory tests in 207 people treated for 1–30 years

A total of 207 patients (diagnoses revised according to DSM-III-R) attended our outpatient clinic and were treated with lithium for 1-30 years. They were subjected to conventional renal, thyroid and parathyroid function tests. With increasing treatment duration, the renal tests showed only moderate deviations from expected reference values. No patient developed renal insufficiency. Oversubstitution (thyrotropin < or = 0.1 mU/l) was suspected in 25% of the patients on thyroxine. Cross-sectionally unrecognized hypothyroidism was found in 6% of the patients. Elevated ionized serum calcium was found in 25% and elevated serum intact parathyroid hormone in 23% of the patients.

Renal Insufficiency and Secondary Hyperparathyroidism in Elderly Patients

Glomerular filtration rate (GFR) is frequently reduced in elderly people. However, the effect of this on mineral metabolism in this population has received little attention. GFR, serum intact parathyroid hormone (PTH) and vitamin D metabolites were measured in 37 patients admitted to hospital for various reasons. In 20 patients with GFR greater than 50 mL/min, an elevated serum intact PTH concentration (greater than 5.4 pmol/L) was found in two, while in 17 patients with GFR less than 50 mL/min PTH was elevated in 13. One of this group was hypercalcaemic and presumed to have primary hyperparathyrodism. Adjusted calcium was normal in all other patients. Two patients had a low serum 25-hydroxyvitamin D concentration (less than 9 nmol/L) suggesting vitamin D insufficiency while a further five had a reduced 1,25-dihydroxyvitamin D concentration, four of these having a GFR less than 50 mL/min. We conclude that hyperparathyrodism is common in hospitalized elderly patients, particularly in those with mild to moderate renal insufficiency. This may contribute to bone mineral loss in such patients.

Elevated serum intact parathyroid hormone levels in elderly patients with hip fracture.

It has been postulated that secondary hyperparathyroidism contributes to bone loss and the high incidence of hip fractures in the elderly population, but there are no data on serum intact parathyroid hormone concentrations in these patients. In this study, serum intact parathyroid hormone (PTH) levels have been measured in 39 elderly patients with hip fracture; in addition, serum 25-hydroxyvitamin D3 and 1,25-dihydroxyvitamin D3 concentrations have been measured. Twenty patients (51.3%) had elevated serum intact PTH concentrations whilst five (12.8%) had abnormally low serum 25-hydroxyvitamin D3 levels and serum 1,25-dihydroxyvitamin D3 was reduced in only two. These results provide the first direct evidence for secondary hyperparathyroidism in elderly patients with hip fracture. Vitamin D deficiency is unlikely to be the sole cause of secondary hyperparathyroidism in these subjects and calcium deficiency by itself may also contribute.

6. Elevated serum intact parathyroid hormone levels in elderly patients with hip fracture

6. Elevated serum intact parathyroid hormone levels in elderly patients with hip fracture