scholarly journals Intact parathyroid hormone levels localize causative glands in persistent or recurrent renal hyperparathyroidism: A retrospective cohort study

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0248366
Author(s):  
Takahisa Hiramitsu ◽  
Toshihide Tomosugi ◽  
Manabu Okada ◽  
Kenta Futamura ◽  
Norihiko Goto ◽  
...  
Keyword(s):  
Parathyroid Hormone ◽  
Area Under The Curve ◽  
Parathyroid Glands ◽  
Total Parathyroidectomy ◽  
Renal Hyperparathyroidism ◽  
Intact Pth ◽  
Receiver Operating Characteristic Curves ◽  
Detailed Imaging ◽  
Forearm Autograft ◽  
Pth Level

Persistent or recurrent renal hyperparathyroidism may occur after total parathyroidectomy and transcervical thymectomy with forearm autograft under continuous stimulation due to uremia. Parathyroid hormone (PTH) levels may reflect persistent or recurrent renal hyperparathyroidism because of the enlarged autografted parathyroid glands in the forearm or remnant parathyroid glands in the neck or mediastinum. Detailed imaging requires predictive localization of causative parathyroid glands. Casanova and simplified Casanova tests may be convenient. However, these methods require avascularization of the autografted forearm for >10 min with a tourniquet or Esmarch. The heavy pressure during avascularization can be incredibly painful and result in nerve damage. An easier method that minimizes the burden on patients in addition to predicting the localization of causative parathyroid glands was developed in this study. Ninety patients who underwent successful re-parathyroidectomy for persistent or recurrent renal hyperparathyroidism after parathyroidectomy between January 2000 and July 2019 were classified according to the localization of causative parathyroid glands (63 and 27 patients in the autografted forearm and the neck or mediastinum groups, respectively). Preoperatively, intact PTH levels were measured from bilateral forearm blood samples following a 5-min avascularization of the autografted forearm. Cutoff values of the intact PTH ratio (intact PTH level obtained from the non-autografted forearm before re-parathyroidectomy/intact PTH level obtained from the autografted forearm before re-parathyroidectomy) were investigated with receiver operating characteristic curves to localize the causative parathyroid glands. Intact PTH ratios of <0.310 with an area under the curve (AUC) of 0.913 (95% confidence interval [CI]: 0.856–0.970; P < 0.001) and >0.859 with an AUC 0.744 (95% CI: 0.587–0.901; P = 0.013) could predict causative parathyroid glands in the autografted forearm and the neck or mediastinum with diagnostic accuracies of 81.1% and 83.3%, respectively. Therefore, we propose that the intact PTH ratio is useful for predicting the localization of causative parathyroid glands for re-parathyroidectomy.

scholarly journals Pre-operative Localisation of the Parathyroid Glands in Secondary Hyperparathyroidism: A Retrospective Cohort Study

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Takahisa Hiramitsu ◽  
Toshihide Tomosugi ◽  
Manabu Okada ◽  
Kenta Futamura ◽  
Makoto Tsujita ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cohort Study ◽  
Parathyroid Hormone ◽  
Secondary Hyperparathyroidism ◽  
Retrospective Cohort ◽  
Parathyroid Glands ◽  
Imaging Modalities ◽  
Intact Parathyroid Hormone ◽  
Intact Pth ◽  
Persistent Hyperparathyroidism

Abstract Complete parathyroidectomy (PTx) is essential during total PTx for secondary hyperparathyroidism (SHPT) to prevent recurrent and persistent hyperparathyroidism. Pre-operative imaging evaluations, including computed tomography (CT), ultrasonography (US), and Tc-99m sestamibi (MIBI) scans, are commonly performed. Between June 2009 and January 2016, 291 patients underwent PTx for SHPT after pre-operative evaluations involving CT, US, and MIBI scans, and the diagnostic accuracies of these imaging modalities for identifying the parathyroid glands were evaluated in 177 patients whose intact parathyroid hormone (PTH) levels were <9 pg/mL after the initial PTx. Additional PTx procedures were performed on 7 of 114 patients whose intact PTH levels were >9 ng/mL after PTx, and the diagnostic validities of the imaging modalities for the remnant parathyroid glands were evaluated. A combination of CT, US, and MIBI scans achieved the highest diagnostic accuracy (75%) for locating bilateral upper and lower parathyroid glands before initial PTx. The accuracies of CT, US, and MIBI scans with respect to locating remnant parathyroid glands before additional PTx were 100%, 28.6%, and 100%, respectively. A combination of CT, US, and MIBI scans is useful for initial PTx for SHPT, and CT and MIBI scans are useful imaging modalities for additional PTx procedures.

scholarly journals Application of Tissue Aspirate Parathyroid Hormone Assay for Imaging Suspicious Neck Lesions in Patients with Complicated Recurrent or Persistent Renal Hyperparathyroidism

2021 ◽  
Vol 10 (2) ◽  
pp. 329
Author(s):  
Chien-Ling Hung ◽  
Yu-Chen Hsu ◽  
Shih-Ming Huang ◽  
Chung-Jye Hung
Keyword(s):  
Parathyroid Hormone ◽  
Final Diagnosis ◽  
Imaging Studies ◽  
Renal Hyperparathyroidism ◽  
Operative Surgery ◽  
Parathyroid Hormone Assay ◽  
Serum Pth ◽  
Pth Level ◽  
Suspicious Lesions

Background: Comprehensive pre-reoperative localization is essential in complicated persistent or recurrent renal hyperparathyroidism. The widely used imaging studies sometimes lead to ambiguous results. Our study aimed to clarify the role of tissue aspirate parathyroid hormone (PTH) assay with a new positive assay definition for imaging suspicious neck lesions in these challenging scenarios. Methods: All patients with complicated recurrent or persistent renal hyperparathyroidism underwent parathyroid sonography and scintigraphy. Echo-guided tissue aspirate PTH assay was performed in suspicious lesions revealed by localization imaging studies. The tissue aspirate PTH level was determined by an immunoradiometric assay. We proposed a newly-developed definition for positive assay as a washout level higher than one-thirtieth of the serum PTH level obtained at the same time. The final diagnosis after re-operation was confirmed by the pathologists. Results: In total, 50 tissue aspirate PTH assays were performed in 32 patients with imaging suspicious neck lesions, including discrepant results between scintigraphy and sonography in 47 lesions (94%), unusual locations in 19 lesions (38%), multiple foci in 28 lesions (56%), and locations over previously explored areas in 31 lesions (62%). Among 39 assay-positive lesions, 13 lesions (33.3%) were not identified by parathyroid scintigraphy, and 28 lesions (71.8%) had uncertain parathyroid sonography findings. The final pathology in patients who underwent re-operative surgery proved the tissue aspirate PTH assays had a 100% positive predictive value. Conclusions: Our findings suggest tissue aspirate PTH assay with this new positive assay definition is beneficial to clarify the nature of imaging suspicious lesions in patients with complicated persistent or recurrent renal hyperparathyroidism.

More than 1,000 cases of total parathyroidectomy with forearm autograft for renal hyperparathyroidism

2001 ◽  
Vol 38 (4) ◽  
pp. S168-S171 ◽  
Author(s):  
Yoshihiro Tominaga ◽  
Kazuharu Uchida ◽  
Toshihito Haba ◽  
Akio Katayama ◽  
Tetsuhiko Sato ◽  
...  
Keyword(s):  
Total Parathyroidectomy ◽  
Renal Hyperparathyroidism ◽  
Forearm Autograft

scholarly journals Surgical treatment of patients with secondary hyperparathyroidism in chronic renal failure

2003 ◽  
Vol 49 (6) ◽  
pp. 36-41
Author(s):  
V. N. Smorshchok ◽  
N. S. Kuznetsov ◽  
A. M. Artemova ◽  
L. Ya. Rozhinskaya ◽  
D. G. Beltsevich
Keyword(s):  
Parathyroid Hormone ◽  
Surgical Treatment ◽  
Secondary Hyperparathyroidism ◽  
Clinical Laboratory ◽  
Intraoperative Ultrasound ◽  
Parathyroid Glands ◽  
Total Parathyroidectomy ◽  
Subtotal Parathyroidectomy ◽  
Ultrasound Study ◽  
Made In

The purpose of the study was to define indications for surgical treatment and its scope in patients with secondary hyperparathyroidism in the presence of end-stage chronic renalfailure. The authors examined 80 patients who had a history of long-term procedures of hemo- or peritoneal dialysis. The patients’ mean age was 47±3.2 years. Measurements of the levels of alkaline phosphatase, ionized and total calcium, phosphorus, parathyroid hormone, ultrasound of the parathyroid glands, densitometry and X-ray study were made in all the patients. All the patients received alfacalcidole therapy during different periods of time. Clinical, laboratory, and morphological correlations were made to establish indications for surgical treatment. The sensitivity ofpreoperative ultrasonography was 72.5% and that of intraoperative ultrasound study was as high as 98.4%. The sensitivity of intraoperative revision was 75%. Sixteen of the 20 patients operated on underwent total parathyroidectomy by autografting a fragment of one of the least glands into the muscle. Subtotal parathyroidectomy was made in 3 patients; 3 parathyroid glands were removed in 1. Emergency and planned studies were performed in all the patients. The duration of the patients operated on averaged 14 months. Three patients undergone total parathyroidectomy with autografiing developed signs of hyperparathyroidism following 6, 12, and 13 months, in this connection graft resection was made in these patients. In the follow-up periods of 3 to 6 months, the level of parathyroid hormone became normal after resurgery in 2 of these patients, hypoparathyroidism developed in one patient. Two months after surgery, recurrent secondary hyperthyroidism was detected in 2 of the 3 patients who had undergone subtotal parathyroidectomy (4 and 7 months after the occurrence of signs of transient hypoparathyroidism) and in 1 patient in whom 3 parathyroid glands had been removed. Four of the 20 patients operated on were observed to have hypoparathyroidism that was compensated by calcium preparations and active forms of vitamin D3. Thus, a good result was noted in 70% of the patients after surgical treatment.

scholarly journals A case of a hemodialysis patient with secondary hyperparathyroidism who was resistant to etelcalcetide treatment but not to cinacalcet hydrochloride

2021 ◽  
Author(s):  
Hironori Nakamura ◽  
Masanori Tokumoto ◽  
Mariko Anayama ◽  
Shigekazu Kurihara ◽  
Yasushi Makino ◽  
...  
Keyword(s):  
Secondary Hyperparathyroidism ◽  
Binding Sites ◽  
Hemodialysis Patient ◽  
Total Parathyroidectomy ◽  
Maximal Dose ◽  
Intact Pth ◽  
Casr Gene ◽  
First Case ◽  
Cinacalcet Hydrochloride ◽  
Pth Level

AbstractAlthough both cinacalcet and etelcalcetide are calcimimetics that directly inhibit parathyroid hormone (PTH) secretion by activating the calcium (Ca)-sensing receptor (CaSR), their binding sites are different. We report a first case of a hemodialysis (HD) patient with secondary hyperparathyroidism (SHPT), in whom cinacalcet, but not etelcalcetide, could reduce serum intact PTH (i-PTH) levels. A HD patient received total parathyroidectomy (PTx) with auto-transplantation 16 years earlier. Due to SHPT relapse, cinacalcet was started at 7 years after PTx. His i-PTH levels had been controlled with both 75–100 mg of cinacalcet and 4.5 μg/week of calcitriol for a year before switching from cinacalcet to etelcalcetide. At 1 month following the switch, his serum i-PTH level increased to 716 pg/mL. The dose of etelcalcetide was gradually increased and finally reached the maximal dose of 45 mg/week. Because even the maximal dose of etelcalcetide for > 4 months did not reduce his serum i-PTH levels to < 700 pg/mL, etelcalcetide was switched to 50 mg/day of cinacalcet, which reduced the levels to 208 pg/mL at 2 months after the switch. Genomic sequencing test using whole blood revealed no mutation in the portion including Cys 482 of CaSR gene. The patient was resistant to etelcalcetide treatment but not to cinacalcet, suggesting the possibility that the enlarged parathyroid gland has some change in the portion including Cys 482 in the CaSR gene. Therefore, considering the possibility of etelcalcetide resistance during SHPT treatment should be kept in mind.

scholarly journals Intact Parathyroid Hormone Level in Different Stages of Chronic Kidney Disease

2011 ◽  
Vol 17 (Number 2) ◽  
pp. 9-14
Author(s):  
N Y Mili ◽  
R Begum ◽  
Md. E Hoque ◽  
Q S Akhter
Keyword(s):  
Chronic Kidney Disease ◽  
Parathyroid Hormone ◽  
Kidney Disease ◽  
Hormone Level ◽  
Stage Iv ◽  
Control Group ◽  
Parathyroid Hormone Level ◽  
Intact Pth ◽  
Three Stages ◽  
Pth Level

Secondary hyperparathyroidism is the first and most recognizable complication of chronic kidney disease (CKD) because parathyroid hormone (PTH) plays a compensatory role to maintain calcium and phosphate homeostasis. Progressive renal failure give rise to a steady increase in parathyroid hormone concentration. which is related to occurrence of renal bone disease. The objective of this study was to find out the httact parathyroid hormone level in different stages of chronic kidney disease patients. This cross sectional study was carried ow in the department of physiology. Dhaka Medical College from January to December 2009. 100 chronic kidney disease patients aged 20 to 60 years were selected as experimental group and 20 apparently healthy subjects were in control group and were matched for age and body weight. Patients were divided into three stages based on their creatinine clearance rate (Ccr). Group B, includes 34 patients marked as stage 11 with Ccr 60-89 ml/min, Group Ba Group B3 consists of 36 and 30 patients each and marked as stage 111 and stage IV with Ccr 30-59 mIhnin and 15-29 Skills respectively. Intact PTH was measured by chemiluminescent hnutuno assay method. Statistical analysis was done by unpaired Student's "1"- test and pearson's Correlation test. Mean serum PTH level was significantly higher in all experimental groups than that of control group (p< 0.001). High level of Pal was found in 74% patients in stage 11, 81% in stage III and 97% patients in stage IV. Again, a significant negative correlation of parathyroid hormone with Ccr was observed in patients with CKD in all three stages. From the findings of the present study it may be concluded that intact PTH level progressively increases from early stage to late stage of chronic kidney disease.

scholarly journals Parathyroid Hormone Monitoring during Total Parathyroidectomy for Renal Hyperparathyroidism: Pilot Study of the Impact of Renal Function and Assay Specificity

2006 ◽  
Vol 52 (6) ◽  
pp. 1112-1119 ◽  
Author(s):  
Christian Bieglmayer ◽  
Klaus Kaczirek ◽  
Gerhard Prager ◽  
Bruno Niederle
Keyword(s):  
Renal Function ◽  
Parathyroid Hormone ◽  
Postoperative Outcome ◽  
Biologically Active ◽  
Subtotal Resection ◽  
Total Parathyroidectomy ◽  
Renal Hyperparathyroidism ◽  
Poor Renal Function ◽  
Parathyroid Hormone Monitoring ◽  
The Impact

Abstract Background: Commonly used assays for intact parathyroid hormone (iPTH) detect not only the biologically active 84–amino acid hormone [PTH(1–84)], but cross-react with an N-terminal–truncated fragment. Because iPTH assays often fail to predict success of parathyroidectomy in patients with renal hyperparathyroidism (rHPT), we compared results of a 3rd-generation PTH(1–84) assay (Bio-iPTH; Nichols Institute Diagnostics) with two 2nd-generation iPTH assays (from Nichols and Roche Diagnostics) by evaluating the PTH clearance kinetics during surgical treatment. Methods: We collected blood samples in short time intervals from 35 consecutive surgical patients with rHPT. Three patients had to be excluded from further calculations; the remainder were grouped according to kidney function and postoperative outcome. All samples were analyzed with the 3 automated PTH assays, which have different specificities. Results: Twenty minutes after removal of the last gland, the PTH(1–84) values decreased to within the reference intervals in all patients with total and subtotal resection; however, iPTH concentrations normalized in only one half of these patients. In patients with poor renal function, the half-life of PTH(1–84) was shorter than the half-lives obtained with the iPTH assays. Conclusions: The accuracy of PTH monitoring during surgery for rHPT depends on renal function and assay specificity. All assays tested showed similar effectiveness in detecting missed glands, but the assay for PTH(1–84) gave more reliable results than the iPTH assays, which overestimated the concentration of PTH and hampered the intrasurgical diagnosis of resection sufficiency.

PARATHYROID HORMONE SECRETION IN DISORDERS OF CALCIUM METABOLISM STUDIED BY MEANS OF EDTA

1974 ◽  
Vol 75 (2) ◽  
pp. 286-296 ◽  
Author(s):  
J. H. Lockefeer ◽  
W. H. L. Hackeng ◽  
J. C. Birkenhäger
Keyword(s):  
Parathyroid Hormone ◽  
Primary Hyperparathyroidism ◽  
Calcium Metabolism ◽  
Hormone Secretion ◽  
Parathyroid Tissue ◽  
Small Mass ◽  
Idiopathic Hypercalciuria ◽  
List Type ◽  
Immunoreactive Parathyroid Hormone ◽  
Pth Level

ABSTRACT In 22 of 28 cases of primary hyperparathyroidism (PHP) the rise in the serum immunoreactive parathyroid hormone (IRPTH or PTH) level observed in response to lowering of the serum calcium by EDTA, exceeded that obtained in 8 control subjects. In 5 of these 22 patients who were studied again after parathyroidectomy the supranormal response was abolished. Fifteen of these 22 hyper-responsive PHP patients had basal IRPTH levels not exceeding the highest level in the controls and that of other groups of patients investigated (idiopathic hypercalciuria, non-parathyroid hypercalcaemia, operated PHP). Fourteen of the 22 hyper-reactive patients with PHP did not show hypocalcaemia during the infusion of EDTA. The extent of the release of PTH elicited by EDTA in cases of PHP does not as yet allow a prediction of the amount of pathological parathyroid tissue present, although all the PHP patients showing a normal release of PTH had a relatively small mass of parathyroid tissue (up to about 1 g) subsequently removed. In 9 cases of nephrolithiasis (8 of whom had idiopathic hypercalciuria) and in 7 cases of non-parathyroid hypercalcaemia, a normal PTH release was found.

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