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Tellam JJ, Abdulrasool G, Ciin LCH. Think twice: a rare calcium sensing receptor mutation and a new diagnosis of familial hypocalciuric hypercalcaemia. Endocrinol Diabetes Metab Case Rep 2020; 2020:EDM200004. [PMID: 32698162 PMCID: PMC7354709 DOI: 10.1530/edm-20-0004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 05/29/2020] [Indexed: 11/22/2022] Open
Abstract
SUMMARY Distinguishing primary hyperparathyroidism (PHPT) from familial hypocalciuric hypercalcaemia (FHH) can be challenging. Currently, 24-h urinary calcium is used to differentiate between the two conditions in vitamin D replete patients, with urinary calcium creatinine clearance ratio (UCCR) <0.01 suggestive of FHH and >0.02 supportive of PHPT. A 26-year-old Caucasian gentleman presented with recurrent mild hypercalcaemia and inappropriately normal parathyroid hormone (PTH) following previous parathyroidectomy 3 years prior. He had symptoms of fatigue and light-headedness. He did not have any other symptoms of hypercalcaemia. His previous evaluation appeared to be consistent with PHPT as evidenced by hypercalcaemia with inappropriately normal PTH and UCCR of 0.0118 (borderline low using guidelines of >0.01 consistent with PHPT). He underwent parathyroidectomy and three parathyroid glands were removed. His calcium briefly normalised after surgery, but rose again to pre-surgery levels within 3 months. Subsequently, he presented to our centre and repeated investigations showed 24-h urinary calcium of 4.6 mmol/day and UCCR of 0.0081 which prompted assessment for FHH. His calcium-sensing receptor (CASR) gene was sequenced and a rare inactivating variant was detected. This variant was described once previously in the literature. His mother was also confirmed to have mild hypercalcaemia with hypocalciuria and, on further enquiry, had the same CASR variant. The CASR variant was classified as likely pathogenic and is consistent with the diagnosis of FHH. This case highlights the challenges in differentiating FHH from PHPT. Accurate diagnosis is vital to prevent unnecessary surgical intervention in the FHH population and is not always straightforward. LEARNING POINTS Distinguishing FHH from PHPT with co-existing vitamin D deficiency is difficult as this can mimic FHH. Therefore, ensure patients are vitamin D replete prior to performing 24-h urinary calcium collection. Individuals with borderline UCCR could have either FHH or PHPT. Consider performing CASR gene sequencing for UCCR between 0.01 and 0.02. Parathyroid imaging is not required for making the diagnosis of PHPT. It is performed when surgery is considered after confirming the diagnosis of PHPT.
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Affiliation(s)
- Jane J Tellam
- Royal Brisbane and Women’s Hospital, Herston, Queensland, Australia
- University of Queensland, Herston, Queensland, Australia
| | - Ghusoon Abdulrasool
- Royal Brisbane and Women’s Hospital, Herston, Queensland, Australia
- University of Queensland, Herston, Queensland, Australia
- Pathology Queensland, Australia
| | - Louise C H Ciin
- Gold Coast University Hospital, Southport, Queensland, Australia
- Griffith University, Southport, Queensland, Australia
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Bhangu JS, Selberherr A, Brammen L, Scheuba C, Riss P. Efficacy of calcium excretion and calcium/creatinine clearance ratio in the differential diagnosis of familial hypocalciuric hypercalcemia and primary hyperparathyroidism. Head Neck 2018; 41:1372-1378. [DOI: 10.1002/hed.25568] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 08/08/2018] [Accepted: 11/21/2018] [Indexed: 11/10/2022] Open
Affiliation(s)
- Jagdeep Singh Bhangu
- Section of Endocrine Surgery, Division of General Surgery, Department of SurgeryMedical University of Vienna Vienna Austria
| | - Andreas Selberherr
- Section of Endocrine Surgery, Division of General Surgery, Department of SurgeryMedical University of Vienna Vienna Austria
| | - Lindsay Brammen
- Section of Endocrine Surgery, Division of General Surgery, Department of SurgeryMedical University of Vienna Vienna Austria
| | - Christian Scheuba
- Section of Endocrine Surgery, Division of General Surgery, Department of SurgeryMedical University of Vienna Vienna Austria
| | - Philipp Riss
- Section of Endocrine Surgery, Division of General Surgery, Department of SurgeryMedical University of Vienna Vienna Austria
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Moore EC, Berber E, Jin J, Krishnamurthy V, Shin J, Siperstein A. CALCIUM CREATININE CLEARANCE RATIO IS NOT HELPFUL IN DIFFERENTIATING PRIMARY HYPERPARATHYROIDISM FROM FAMILIAL HERPERCALCEMIC HYPOCALCIURIA: A STUDY OF 1000 PATIENTS. Endocr Pract 2018; 24:S1530-891X(20)35470-7. [PMID: 30289313 DOI: 10.4158/ep-2018-0350] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
OBJECTIVE With increasing recognition of more subtle presentations of primary hyperparathyroidism (pHPT), laboratory values are frequently seen in a range that would be expected for patients who have familial hypercalcemic hypocalciuria (FHH). Calcium creatinine clearance ratio (CCCR) has been advocated as a diagnostic tool to differentiate between these two disorders. However, it is limited by an indeterminate range (0.01-0.02). The aim of this study is to assess the relevance of CCCR in a modern series of patients with surgically managed pHPT. METHODS We performed a retrospective cohort study of 1000 patients who underwent parathyroid surgery for pHPT over eleven years. CCCR was evaluated by degree of biochemical derangement, single versus multiple gland disease and interfering medications. RESULTS Patient demographics and resected histopathology were typical for a current series of patients with pHPT. In retrospect, none of the patients were suspected to have FHH post operatively. CCCR was less than 0.01 for 19.0%, between 0.01-0.02 for 43.7% and greater than 0.02 in 37.3%. Distribution of CCCR for patients free from interfering medications and different histological subtypes were the same. One third of the cohort had mild calcium elevations, more typical for FHH. Of these, almost two thirds had a CCCR in a range suspect for FHH (<0.02). CONCLUSION To our knowledge this is the largest series to evaluate the validity of CCCR for patients with surgically confirmed pPHT. The utility of CCCR in screening for FHH is limited, as 63% of modern patients with confirmed pHPT have low values.
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Diagnosis and Differential Diagnosis of Primary Hyperparathyroidism. Updates Surg 2016. [DOI: 10.1007/978-88-470-5758-6_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Meng QH, Wagar EA. Laboratory approaches for the diagnosis and assessment of hypercalcemia. Crit Rev Clin Lab Sci 2014; 52:107-19. [DOI: 10.3109/10408363.2014.970266] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Grabmaier U, Brandl L, Kreiner J, Negele T, Huber BC, Rimmbach C, David R, Brunner S. Increased numbers of bone marrow-derived cells in parathyroid adenoma. Eur J Clin Invest 2014; 44:833-9. [PMID: 25047264 DOI: 10.1111/eci.12302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 07/17/2014] [Indexed: 12/26/2022]
Abstract
BACKGROUND In primary hyperparathyroidism (PHPT), the increased levels of parathyroid hormone (PTH) result in mobilisation of bone-marrow-derived cells (BMCs) into peripheral blood. However, the fate of these cells is still unknown. MATERIALS AND METHODS In this study, we sought to investigate cells with typical surface markers of BMCs within parathyroid adenomas (PA) of patients with primary hyperparathyroidism. We therefore investigated PA and normal parathyroid glands (NPG) of 15 patients with PHPT by immunohistochemistry and PCR. RESULTS mRNA levels for CD31, CD34 and CD45 were significantly increased in PA compared to NPG. Immunohistochemical staining for CD31 and CD34 revealed a significantly higher vessel density in PA. Furthermore, scattered single cells expressing CD31, CD34 or CD45 were significantly augmented compared to normal parathyroid glands and directly correlated with vessel density. mRNA levels of SDF-1 was increased whereas its major inhibitor dipeptidylpeptidase IV (DPP IV) is decreased in PA, suggesting that the SDF-1 axis plays a role in the migration of BMCs into PA. CONCLUSION These data indicate a possible role of BMCs in the pathophysiology of PA of patients with PHPT.
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Affiliation(s)
- Ulrich Grabmaier
- Medical Department I, Ludwig-Maximilians-University, Campus Innenstadt and Grosshadern, Munich, Germany
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It is time to start ordering ionized calcium more frequently: preanalytical factors can be controlled and postanalytical data justify measurement. Ann Clin Biochem 2013; 50:191-3. [DOI: 10.1177/0004563213482892] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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8
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Glendenning P, Inderjeeth CA. Vitamin D: Methods of 25 hydroxyvitamin D analysis, targeting at risk populations and selecting thresholds of treatment. Clin Biochem 2012; 45:901-6. [DOI: 10.1016/j.clinbiochem.2012.04.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 04/03/2012] [Accepted: 04/03/2012] [Indexed: 12/31/2022]
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Nissen PH, Christensen SE, Ladefoged SA, Brixen K, Heickendorff L, Mosekilde L. Identification of rare and frequent variants of the CASR gene by high-resolution melting. Clin Chim Acta 2012; 413:605-11. [DOI: 10.1016/j.cca.2011.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 12/02/2011] [Accepted: 12/05/2011] [Indexed: 10/14/2022]
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10
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Screening for vitamin D deficiency: defining vitamin D deficiency, target thresholds of treatment and estimating the benefits of treatment. Pathology 2012; 44:160-5. [DOI: 10.1097/pat.0b013e32834e8df6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Christensen SE, Nissen PH, Vestergaard P, Mosekilde L. Familial hypocalciuric hypercalcaemia: a review. Curr Opin Endocrinol Diabetes Obes 2011; 18:359-70. [PMID: 21986511 DOI: 10.1097/med.0b013e32834c3c7c] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE OF REVIEW Hypercalcaemia is a potentially life-threatening condition. Familial hypocalciuric hypercalcaemia (FHH) is a rare, lifelong, benign condition. It is important to separate this condition from other hypercalcaemic states such as hypercalcaemia of malignancy and primary hyperparathyroidism (PHPT). RECENT FINDINGS FHH is caused by inactivating mutations in the calcium sensing receptor (CASR) gene leading to a general calcium-hyposensitivity, compensatory hypercalcaemia and hypocalciuria. The inheritance of FHH is autosomal dominant. Similar to PHPT, FHH is characterized by hypercalcaemia, unsuppressed or elevated plasma parathyroid hormone, and typically normal renal function. The phenotype is normal, and hypercalcaemic symptoms are generally absent. The hallmark is a relatively low urine calcium excretion in contrast to PHPT, in which urine calcium excretion is increased. The vitamin D status as measured by plasma 25-hydroxyvitamin D has been reported to be normal with normal seasonal variations, whereas plasma 1,25-dihydroxyvitamin D has been found slightly increased compared to normal. Bone mineral density Z-scores are normal in spite of a slightly increased bone turnover. Differential diagnoses include mainly PHPT, but in some cases also hypercalcaemia of malignancy and use of thiazide diuretics. SUMMARY In general, FHH does not require treatment. We recommend a two-step diagnostic procedure. First, the calcium/creatinine clearance ratio is measured from a 24-h urine. Second, all patients with calcium/creatinine clearance ratio of 0.020 or less are tested for mutations in the CASR gene. The diagnostic sensitivity of this setup is 98%.
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Affiliation(s)
- Signe E Christensen
- Department of Medicine and Endocrinology, Aarhus University Hospital, Aarhus C, Denmark.
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Zhao L, Zhang MJ, Zhao HY, Sun LH, Li JL, Tao B, Wang WQ, Ning G, Liu JM. PTH inhibition rate is useful in the detection of early-stage primary hyperparathyroidism. Clin Biochem 2011; 44:844-8. [DOI: 10.1016/j.clinbiochem.2011.03.142] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 03/19/2011] [Accepted: 03/23/2011] [Indexed: 12/01/2022]
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Jayasena CN, Mahmud M, Palazzo F, Donaldson M, Meeran K, Dhillo WS. Utility of the urine calcium-to-creatinine ratio to diagnose primary hyperparathyroidism in asymptomatic hypercalcaemic patients with vitamin D deficiency. Ann Clin Biochem 2011; 48:126-9. [DOI: 10.1258/acb.2010.010202] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Background Primary hyperparathyroidism (PHP) is the most common cause of hypercalcaemia, and often requires surgical treatment. Familial hypocalciuric hypercalcaemia (FHH) has similar biochemical features to PHP, but requires no treatment. The most common biochemical method used to distinguish between PHP and FHH is the urine calcium-to-creatinine ratio (UCCR). Vitamin D deficiency may alter the renal excretion of calcium, but it is unclear how vitamin D deficiency affects the diagnostic performance of UCCR. Aim To examine the reliability of UCCR to detect PHP in patients presenting with asymptomatic hypercalcaemia, in the presence or absence of vitamin D deficiency. Methods One hundred and eighteen UCCR measurements from 97 asymptomatic hypercalcaemic patients diagnosed with PHP presenting to a single specialist endocrine unit were analysed retrospectively. Results A significantly higher proportion of UCCR measurements were <0.010 in patients with serum vitamin D <25 nmol/L when compared with patients with serum vitamin D >25 nmol/L, thus incorrectly suggesting the presence of FHH (proportion of measurements with UCCR >0.010: 11/48 [22.9%], vitamin D <25 nmol/L; 4/70 [5.7%], vitamin D >25 nmol/L; P < 0.001). Urine calcium concentration was 26% lower and serum parathyroid hormone (PTH) was 27% higher in patients with vitamin D deficiency when compared with patients without vitamin D deficiency. Conclusions These data suggest that the presence of vitamin D deficiency is associated with worsened PTH hypersecretion, impairment of urinary calcium excretion and reduced sensitivity of UCCR measurement with respect to the detection of PHP. These data have important clinical implications for the investigation and management of patients with asymptomatic hypercalcaemia.
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Affiliation(s)
| | | | - Fausto Palazzo
- Department of Endocrine Surgery, Imperial College London, Hammersmith Hospital
| | - Mandy Donaldson
- Department of Clinical Chemistry, Imperial College Healthcare NHS Trust, Charing Cross Hospital, London, UK
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Christensen SE, Nissen PH, Vestergaard P, Heickendorff L, Brixen K, Mosekilde L. Discriminative power of three indices of renal calcium excretion for the distinction between familial hypocalciuric hypercalcaemia and primary hyperparathyroidism: a follow-up study on methods. Clin Endocrinol (Oxf) 2008; 69:713-20. [PMID: 18410554 DOI: 10.1111/j.1365-2265.2008.03259.x] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Familial hypocalciuric hypercalcaemia (FHH) must be differentiated from primary hyperparathyroidism (PHPT) because prognosis and treatment differ. In daily practice this discrimination is often based on the renal calcium excretion or the calcium/creatinine clearance ratio (CCCR). However, the diagnostic performance of these variables is poorly documented. AIM To appraise the power of various simple biochemical variables to differentiate between FHH and PHPT using calcium sensing receptor (CASR) gene analysis and histopathological findings as gold standards. DESIGN Follow-up approach (direct design). MATERIALS We included 54 FHH patients (17 males and 37 females, aged 18-75 years) with clinically significant mutations in the CASR gene and 97 hypercalcaemic patients with histologically verified PHPT (17 males and 80 females, aged 19-86 years). All PHPT patients became normocalcaemic following successful neck exploration. RESULTS Based on receiver operating characteristic (ROC) curve analysis, the CCCR was only marginally better, as judged by the area under curve (AUC = 0.923 +/- 0.021 (SE)), than the 24-h calcium/creatinine excretion ratio (AUC = 0.903 +/- 0.027) and the 24-h calcium excretion (AUC = 0.876 +/- 0.029). However, overlap performance analysis disclosed that the CCCR included fewer patients with PHPT together with the FHH patients than the other two variables at different cut-off points. Based on the ROC curve, the optimal cut-off point for diagnosing FHH using CCCR was < 0.0115, which yielded a diagnostic specificity of 0.88 and a sensitivity of 0.80. Overlap analysis revealed that a cut-off point for CCCR at < 0.020 would sample 98% (53/54) of all patients with FHH and include 35% (34/97) of the PHPT patients. CONCLUSION Our results support the use of the CCCR as an initial screening test for FHH. We suggest a two-step diagnostic procedure, where the first step is based on the CCCR with a cut-off at < 0.020, and the second step is CASR gene analysis in patients with FHH or PHPT.
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Dehesdin D, Guerrier B, Santini J, Zanaret M, Le Clech G. [Parathyroid adenoma]. ANNALES D'OTO-LARYNGOLOGIE ET DE CHIRURGIE CERVICO FACIALE : BULLETIN DE LA SOCIETE D'OTO-LARYNGOLOGIE DES HOPITAUX DE PARIS 2008; 125:78-84. [PMID: 18436188 DOI: 10.1016/j.aorl.2007.04.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2007] [Accepted: 04/17/2007] [Indexed: 11/27/2022]
Affiliation(s)
- Danièle Dehesdin
- Service ORL et CCF, CHU, hôpital Charles-Nicolle, 1, 76031 Rouen cedex, France
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Brunner S, Theiss HD, Murr A, Negele T, Franz WM. Primary hyperparathyroidism is associated with increased circulating bone marrow-derived progenitor cells. Am J Physiol Endocrinol Metab 2007; 293:E1670-5. [PMID: 17911347 DOI: 10.1152/ajpendo.00287.2007] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Recently, parathyroid hormone (PTH) was shown to support survival of progenitor cells in bone marrow. The release of progenitor cells occurs in physiological and pathological conditions and was shown to contribute to neovascularization in tumors and ischemic tissues. In the present study we sought to investigate prospectively the effect of primary hyperparathyroidism (PHPT) on mobilization of bone marrow-derived progenitor cells. In 22 patients with PHPT and 10 controls, defined subpopulations of circulating bone marrow-derived progenitor cells (BMCs) were analyzed by flow cytometry (CD45(+)/CD34(+)/CD31(+) cells indicating endothelial progenitor cells, CD45(+)/CD34(+)/c-kit(+) cells indicating hematopoietic stem cells, and CD45(+)/CD34(+)/CXCR4(+) cells indicating progenitor cells with the homing receptor CXCR4). Cytokine serum levels (SCF, SDF-1, VEGF, EPO, and G-CSF) were assessed using ELISA. Levels of PTH and thyroid hormone as well as serum electrolytes, renal and liver parameters, and blood count were analyzed. Our data show for the first time a significant increase of circulating BMCs and an upregulation of SDF-1 and VEGF serum levels in patients with PHPT. The number of circulating BMCs returned to control levels measured 16.7 +/- 2.3 mo after surgery. There was a positive correlation of PTH levels with the number of CD45(+)/CD34(+)/CD31(+), CD45(+)/CD34(+)/c-kit(+), and CD45(+)/CD34(+)/CXCR4(+) cells. However, there was no correlation between cytokine serum concentrations (SDF-1, VEGF) and circulating BMCs. Serum levels of G-CSF, EPO, and SCF known to mobilize BMCs were even decreased or remained unchanged, suggesting a direct effect of PTH on stem cell mobilization. Our data suggest a new function of PTH mobilizing BMCs into peripheral blood.
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Affiliation(s)
- Stefan Brunner
- Medizinische Klinik und Poliklinik I, Klinikum Grosshadern, Marchioninistr. 15, 81377 Munich, Germany
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Almqvist EG, Becker C, Bondeson AG, Bondeson L, Svensson J, Svensson SE. Increased plasma concentrations of N-terminal pro-B-type natriuretic peptide in patients with mild primary hyperparathyroidism. Clin Endocrinol (Oxf) 2006; 65:760-6. [PMID: 17121527 DOI: 10.1111/j.1365-2265.2006.02663.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
OBJECTIVE Primary hyperparathyroidism (PHPT) is associated with heart disease. The aims of the present study were to evaluate how cardiac function and secretion of N-terminal pro-B-type natriuretic peptide (NT-proBNP) correlate in patients with mild PHPT, and how the plasma level of NT-proBNP is influenced by cure of the parathyroid disease. DESIGN AND PATIENTS Forty-two patients with PHPT without symptoms of heart disease were examined before and 1 year after curative parathyroidectomy. MEASUREMENTS Plasma or serum concentrations of NT-proBNP, calcium, PTH, creatinine, oestradiol, testosterone and SHBG were measured. Cardiac function was evaluated by equilibrium radionuclide angiography (ERNA). RESULTS At baseline, NT-proBNP levels correlated negatively with systolic function [left ventricular ejection fraction (LVEF), P < 0.001]. Twelve per cent of the patients had NT-proBNP levels above normal reference values preoperatively. One year postoperatively, the corresponding proportion was 21%. The mean plasma concentration of NT-proBNP increased after parathyroidectomy (P < 0.01) in parallel with a dip in diastolic function (peak filling rate, P < 0.05) and a falling trend in systolic function (LVEF, P = 0.08). The postoperative percentage changes in circulating NT-proBNP and total oestradiol correlated positively (P < 0.05). CONCLUSIONS Patients with mild PHPT and normal renal function may have high levels of circulating NT-proBNP despite the absence of symptomatic heart disease. Cure of the parathyroid disease is followed by a further increase in NT-proBNP secretion in parallel with ERNA measures, indicating subclinical changes in heart function. These results are in line with data indicating an association between PHPT and increased risk of premature death.
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Affiliation(s)
- Erik G Almqvist
- Department of Internal Medicine, Central Hospital, Skövde, Sweden.
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Pahlavan PS, Severin MC. Parathyroid carcinoma: A rare case with mandibular brown tumor. Wien Klin Wochenschr 2006; 118:175-9. [PMID: 16773484 DOI: 10.1007/s00508-006-0566-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Accepted: 01/11/2006] [Indexed: 10/24/2022]
Abstract
Parathyroid carcinoma constitutes less than 1 % of primary hyperparathyroidism. The male to female ratio is approximately equal and the mean age at presentation is 40 years. In about half of the patients there is a palpable cervical mass, and serum calcium level is usually above 14 mg/dl. In a case report we present a 21-year-old man with a non-tender, non-mobile bulging mandibular mass. He suffered from fatigue, recent weight loss, hoarseness, polydipsia, polyuria, hematuria, recurrent renal stones and bouts of constipation and diarrhea. A mandibular biopsy confirmed brown tumor. Serum calcium level was 15.4 mg/dl. Cervical ultrasound revealed a hypoecho area suspicious of parathyroid adenoma. Parathyroid carcinoma was later confirmed and en bloc resection was performed. During a two-year follow up there has been no evidence of recurrence or hypercalcemia. This unique case of parathyroid carcinoma in conjunction with brown tumor is the second reported case worldwide.
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Affiliation(s)
- Payam S Pahlavan
- Department of Physiology and Pathophysiology, University of Heidelberg, Germany.
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Almqvist EG, Becker C, Bondeson AG, Bondeson L, Svensson J. Increase of bioavailable testosterone is associated with gain in bone mineral density after cure of primary hyperparathyroidism in postmenopausal women. Clin Endocrinol (Oxf) 2006; 64:58-62. [PMID: 16402929 DOI: 10.1111/j.1365-2265.2005.02416.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The recovery of bone mineral density (BMD) after surgical cure of primary hyperparathyroidism (PHPT) seems to be multifactorial and not just dependent on declining PTH. The aim of the present study was to evaluate the role of sex steroids in this context. DESIGN AND PATIENTS Thirty-six postmenopausal women with PHPT were examined before and 1 year after curative parathyroidectomy. Their mean age at inclusion in the study was 71.7 +/- 1.1 years (range 54-83). BMD was measured in hip and lumbar spine using dual energy X-ray absorptiometry. No patient received any replacement therapy with sex hormones or treatment with corticosteroids, oestrogen receptor modulators or bisphosphonates. MEASUREMENTS Serum concentrations of oestradiol, testosterone, androstenedione, dehydroepiandrosterone sulphate, SHBG, PTH and calcium. RESULTS Postoperative increase of free (bioavailable) testosterone was positively correlated to the change of BMD in the hip (P < 0.01), whereas the change of PTH in serum correlated to the change of BMD in the lumbar spine (P < 0.05). Multiple regression analysis showed that bioavailable testosterone was the most important determinant of change in BMD in both spine and hip (femoral neck: P < 0.05; Ward's triangle: P < 0.001; trochanter: P < 0.01; lumbar spine: P < 0.05). The increase of bioavailable testosterone after curative parathyroidectomy was related to declining SHBG. CONCLUSIONS An increase of bioavailable testosterone following surgical cure of PHPT is related to improvement of hip and lumbar spine BMD in postmenopausal women. This previously unknown hormonal interaction may also be important to other aspects of hyperparathyroidism.
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Affiliation(s)
- Erik G Almqvist
- Department of Internal Medicine, Central Hospital, Skövde, Sweden.
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Younes NA, Shafagoj Y, Khatib F, Ababneh M. Laboratory screening for hyperparathyroidism. Clin Chim Acta 2005; 353:1-12. [PMID: 15698586 DOI: 10.1016/j.cccn.2004.10.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2004] [Revised: 10/14/2004] [Accepted: 10/15/2004] [Indexed: 11/27/2022]
Abstract
INTRODUCTION The clinical syndrome produced by excess parathyroid hormone (PTH) is referred to as hyperparathyroidism (HPT). Autonomous growth of PTH producing cells is defined as primary hyperparathyroidism (pHPT). In its classic form pHPT is characterized by painful bones, kidney stones, abdominal groans, psychic moans, fatigue overtones and hypercalcemia. Chronic stimulation of the parathyroid glands secondary to low circulating calcium level results in secondary hyperparathyroidism (sHPT). Tertiary hyperparathyroidism (tHPT) results from prolonged secondary hyperparathyroidism when the glands take on an autonomous function manifested by hypercalcemia and high PTH levels despite resolution of the original stimulus. REVIEW The paper reviews the physiologic regulation of PTH secretion and types and forms of HPT. Calcium homeostasis is discussed, emphasizing interactions of PTH, PO4 and vitamin D that can lead to HPT. In addition, the paper reviews the contribution of serum calcium, chloride, phosphorus and PTH levels to the diagnosis of HPT, the role of urinary calcium in the diagnosis of familial benign hypocalciuric hypercalcemia (FBHH), and the role of alkaline phosphatase and bone mass measurements as markers of severity of hyperparathyroid bone disease. CONCLUSIONS It is concluded that the diagnosis of hyperparathyroidism can be made with a very high confidence rate by documenting an increased serum PTH level with an increased ionized or total calcium level in pHPT, increased serum PTH level with low or normal calcium level and an underlying renal failure or vitamin D deficiency in sHPT. Early management of HPT is important because many of the nonspecific complains, or classic symptoms, or metabolic conditions often improve after proper control of hyperparathyroidism.
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Affiliation(s)
- Nidal A Younes
- Department of surgery, Faculty of Medicine/University of Jordan, PO Box 13024, Amman 11942, Jordan.
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Morton A. Altered calcium homeostasis during pregnancy may affect biochemical differentiation of hypercalcaemia. Intern Med J 2004; 34:655-6; author reply 656-7. [PMID: 15546467 DOI: 10.1111/j.1445-5994.2004.00713.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Glendenning P. Reply. Intern Med J 2004. [DOI: 10.1111/j.1445-5994.2004.00712.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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