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Choi HR, Choi SH, Hong N, Rhee Y, Kim JK, Lee CR, Kang SW, Lee J, Jeong JJ, Nam KH, Chung WY. Comparisons Between Normocalcemic Primary Hyperparathyroidism and Typical Primary Hyperparathyroidism. J Korean Med Sci 2022; 37:e99. [PMID: 35380024 PMCID: PMC8980367 DOI: 10.3346/jkms.2022.37.e99] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 03/07/2022] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Normocalcemic primary hyperparathyroidism (NPHPT) was first described in 2008. It is defined as consistently elevated serum parathyroid hormone (PTH) levels with normal serum calcium (sCa) concentration, after excluding secondary causes of PTH elevation. However, the exact definition and management strategy for NPHPT remain controversial. We retrospectively investigated the clinicopathological features and short-term outcomes of NPHPT patients. METHODS A total of 280 patients who were surgically indicated for primary hyperparathyroidism (PHPT) at the Yonsei Severance Medical Center between 2015 and 2019 were included. Patients were classified according to preoperative PTH, corrected sCa, and ionized calcium (iCa) levels as follows: typical primary hyperparathyroidism (TPHPT, elevated PTH, sCa, and iCa, n = 158) and NPHPT (elevated PTH, normal sCa, n = 122). RESULTS NPHPT was commonly seen in younger individuals (aged < 50 years, P = 0.025); nephrolithiasis and bone fractures were common. Preoperative PTH level was higher in the TPHPT group (P < 0.001). The NPHPT group had higher numbers of multiple parathyroid lesions (P = 0.004) that were smaller (P = 0.011). NPHPT patients were further divided into two subgroups according to iCa levels: the elevated (n = 95) and normal iCa (n = 27) groups. There was no significant difference between the two subgroups regarding symptoms and multiplicity of lesions. CONCLUSION We found that NPHPT may be a heterogeneous disease entity of PHPT with high rates of multi-gland disease, which appears to be biochemically milder but symptomatic. Intraoperative PTH monitoring might help increase the surgery success rate. Moreover, the short-term outcomes of NPHPT after surgery did not differ from that of TPHPT.
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Affiliation(s)
- Hye Ryeon Choi
- Department of Surgery, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea
| | - Sun Hyung Choi
- Department of Family medicine, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea
| | - Namki Hong
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Yumie Rhee
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Jin Kyong Kim
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Cho Rok Lee
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Sang-Wook Kang
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Jandee Lee
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Jong Ju Jeong
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea.
| | - Kee-Hyun Nam
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Woong Youn Chung
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
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Hollowoa BR, Spencer HJ, Stack BC. Normocalcemic and Normohormonal Primary Hyperparathyroidism: Laboratory Values and End-Organ Effects. Otolaryngol Head Neck Surg 2021; 165:387-397. [PMID: 33461421 DOI: 10.1177/0194599820983728] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Variants of primary hyperparathyroidism (pHPT), described as normocalcemic (NC) and normohormonal (NH), can confuse the diagnosis of classic pHPT. DATA SOURCES A MEDLINE search was performed for variants of pHPT using the PubMed database (last queried October 2019). REVIEW METHODS The search was restricted to articles published after 1960 that were specific to humans. Studies were included in our analysis if laboratory values and incidence of end-organ involvement were reported for NCpHPT and NHpHPT variants. The search returned 189 articles; 27 additional studies were identified and included for a total of 216. Non-English-language studies were excluded. Abstracts were screened, full-text articles were then assessed, and 82 articles were excluded. Data were pooled using a random-effects model in studies that compared NC or NH pHPT to classic pHPT. Comparative laboratory values are presented. CONCLUSION This analysis compares NCpHPT and NHpHPT to classic pHPT. Nephrolithiasis was 21.7% (NCpHPT), 15.9% (classic pHPT), and 25.4% (NHpHPT). Decreased bone mineral density was 49.7% (NCpHPT), 39.7% (classic pHPT), and 40.3% (NHpHPT). Fractures in the NCpHPT group were not significantly different from the classic pHPT. Hypertension in the NCpHPT group was significantly less than classic pHPT (odds ratio, 0.59; 95% CI, 0.40-0.88). IMPLICATIONS FOR CLINICAL PRACTICE This information may serve to inform clinicians of the laboratory subtleties of these variants that are being seen with greater frequency in contemporary practice.
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Affiliation(s)
- Blake R Hollowoa
- Department of Otolaryngology-Head & Neck Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Horace J Spencer
- Department of Biostatistics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Brendan C Stack
- Department of Otolaryngology-Head & Neck Surgery, Southern Illinois University School of Medicine, Springfield, Illinois, USA
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Zavatta G, Clarke BL. Normocalcemic Hyperparathyroidism: A Heterogeneous Disorder Often Misdiagnosed? JBMR Plus 2020; 4:e10391. [PMID: 32803112 PMCID: PMC7422713 DOI: 10.1002/jbm4.10391] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 06/15/2020] [Accepted: 06/24/2020] [Indexed: 12/19/2022] Open
Abstract
Normocalcemic primary hyperparathyroidism (NHPT) was first described over 10 years ago, but uncertainties still remain about its definition, prevalence, and rates of complications. As a result, consensus management guidelines for this condition have not yet been published. Several hypotheses have been proposed for the pathophysiology of NHPT, but it may be a heterogeneous disorder with multiple causes, rather than a single etiology that explains this biochemical phenotype. A common clinical concern is whether NHPT should be treated surgically when complications are already present at first recognition of the disorder, rather than following patients clinically over time. The literature on NHPT is based mostly on larger studies of population‐based cohorts and smaller studies from referral centers. Lack of rigorous diagnostic criteria and selection bias inherent in populations seen at tertiary referral centers may explain the heterogeneity of reported rates of bone and renal complications in relation to consistently mild laboratory alterations. Unresolved questions remain about the significance of NHPT when it is diagnosed biochemically without evident bone or kidney complications. Moreover, its natural history remains to be elucidated because a proportion of what is classified as NHPT may revert to normal spontaneously, thus revealing previously unrecognized secondary hyperparathyroidism. These issues indicate that caution should be used in recommending surgery for NHPT. This review will focus on recent issues regarding the pathophysiology, evaluation, and management of NHPT. © 2020 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Guido Zavatta
- Department of Medical and Surgical Sciences, University of Bologna Italy.,Division of Endocrinology, Diabetes, Metabolism and Nutrition, Mayo Clinic Rochester Minnesota USA
| | - Bart L Clarke
- Division of Endocrinology, Diabetes, Metabolism and Nutrition, Mayo Clinic Rochester Minnesota USA
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Vignali E, Cetani F, Chiavistelli S, Meola A, Saponaro F, Centoni R, Cianferotti L, Marcocci C. Normocalcemic primary hyperparathyroidism: a survey in a small village of Southern Italy. Endocr Connect 2015; 4:172-8. [PMID: 26155986 PMCID: PMC4496527 DOI: 10.1530/ec-15-0030] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
We investigated the prevalence of normocalcemic primary hyperparathyroidism (NPHPT) in the adult population living in a village in Southern Italy. All residents in 2010 (n=2045) were invited by calls and 1046 individuals accepted to participate. Medical history, calcium intake, calcium, albumin, creatinine, parathyroid hormone (PTH) and 25OHD were evaluated. NPHPT was defined by normal albumin-adjusted serum calcium, elevated plasma PTH, and exclusion of common causes of secondary hyperparathyroidism (SHPT) (serum 25OHD <30 ng/ml, estimated glomerular filtration rate (eGFR) <60 ml/min per 1.73 m(2) and thiazide diuretics use), overt gastrointestinal and metabolic bone diseases. Complete data were available for 685 of 1046 subjects. Twenty subjects did not meet the inclusion criteria and 341 could not be evaluated because of thawing of plasma samples. Classical PHPT was diagnosed in four women (0.58%). For diagnosing NPHPT the upper normal limit of PTH was established in the sample of the population (n=100) who had 25OHD ≥30 ng/ml and eGFR ≥60 ml/min per 1.73 m(2) and was set at the mean+3s.d. Three males (0.44%) met the diagnostic criteria of NPHPT. These subjects were younger and with lower BMI than those with classical PHPT. Our data suggest, in line with previous studies, that NPHPT might be a distinct clinical entity, being either an early phenotype of asymptomatic PHPT or a distinct variant of it. However, we cannot exclude that NPHPT might also represent an early phase of non-classical SHPT, since other variables, in addition to those currently taken into account for the diagnosis of NPHPT, might cumulate in a normocalcemic subject to increase PTH secretion.
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Affiliation(s)
- E Vignali
- Endocrine Unit 2University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, ItalyDepartment of Clinical and Experimental MedicineUniversity of Pisa, Pisa, ItalyLaboratory of Chemistry and EndocrinologyUniversity Hospital of Pisa, Pisa, Italy
| | - F Cetani
- Endocrine Unit 2University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, ItalyDepartment of Clinical and Experimental MedicineUniversity of Pisa, Pisa, ItalyLaboratory of Chemistry and EndocrinologyUniversity Hospital of Pisa, Pisa, Italy
| | - S Chiavistelli
- Endocrine Unit 2University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, ItalyDepartment of Clinical and Experimental MedicineUniversity of Pisa, Pisa, ItalyLaboratory of Chemistry and EndocrinologyUniversity Hospital of Pisa, Pisa, Italy
| | - A Meola
- Endocrine Unit 2University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, ItalyDepartment of Clinical and Experimental MedicineUniversity of Pisa, Pisa, ItalyLaboratory of Chemistry and EndocrinologyUniversity Hospital of Pisa, Pisa, Italy
| | - F Saponaro
- Endocrine Unit 2University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, ItalyDepartment of Clinical and Experimental MedicineUniversity of Pisa, Pisa, ItalyLaboratory of Chemistry and EndocrinologyUniversity Hospital of Pisa, Pisa, Italy
| | - R Centoni
- Endocrine Unit 2University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, ItalyDepartment of Clinical and Experimental MedicineUniversity of Pisa, Pisa, ItalyLaboratory of Chemistry and EndocrinologyUniversity Hospital of Pisa, Pisa, Italy
| | - L Cianferotti
- Endocrine Unit 2University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, ItalyDepartment of Clinical and Experimental MedicineUniversity of Pisa, Pisa, ItalyLaboratory of Chemistry and EndocrinologyUniversity Hospital of Pisa, Pisa, Italy
| | - C Marcocci
- Endocrine Unit 2University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, ItalyDepartment of Clinical and Experimental MedicineUniversity of Pisa, Pisa, ItalyLaboratory of Chemistry and EndocrinologyUniversity Hospital of Pisa, Pisa, Italy Endocrine Unit 2University Hospital of Pisa, Via Paradisa 2, 56124 Pisa, ItalyDepartment of Clinical and Experimental MedicineUniversity of Pisa, Pisa, ItalyLaboratory of Chemistry and EndocrinologyUniversity Hospital of Pisa, Pisa, Italy
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Abstract
The biochemical profile of classic primary hyperparathyroidism (pHPT) consists of both elevated calcium and parathyroid hormone levels. The standard of care is parathyroidectomy unless prohibited by medical comorbidities. Because more patients are undergoing routine bone density evaluation and neck imaging studies for other purposes, there is a subset of people identified with a biochemically mild form of the pHPT that expresses itself as either elevated calcium or parathyroid hormone levels. These patients often do not fall into the criteria for operation based on the National Institutes of Health consensus guidelines, and they can present a challenge of diagnosis and management. The purpose of this paper is to review the available literature on mild pHPT in an effort to better characterize this patient population and to determine whether patients benefit from parathyroidectomy. Evidence suggests that there are patients with mild pHPT who have overt symptoms that are found to improve after parathyroidectomy. There is also a group of patients with biochemically mild pHPT who are found to progress to classic pHPT over time; however, it is not predictable which group of patients this will be. Early intervention for this group with mild pHPT may prevent progression of bone, psychiatric, and renal complications, and parathyroidectomy has proven safe in appropriately selected patients at high volume centers.
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Affiliation(s)
- Megan K Applewhite
- Department of General Surgery, Lahey Hospital and Medical Center, Burlington, Massachusetts, USA; Section of Endocrine Surgery, Department of Surgery, University of Wisconsin, Madison, Wisconsin, USA
| | - David F Schneider
- Department of General Surgery, Lahey Hospital and Medical Center, Burlington, Massachusetts, USA; Section of Endocrine Surgery, Department of Surgery, University of Wisconsin, Madison, Wisconsin, USA
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Martínez Díaz-Guerra G, Jódar Gimeno E, Reyes García R, Gómez Sáez JM, Muñoz-Torres M. [Normocalcemic primary hyperparathyroidism: recommendations for management and follow-up]. ACTA ACUST UNITED AC 2013; 60:456.e1-6. [PMID: 23660008 DOI: 10.1016/j.endonu.2013.01.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Accepted: 01/08/2013] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To provide practical recommendations for evaluation and follow-up of patients with normocalcemic primary hyperparathyroidism. PARTICIPANTS Members of the Bone Metabolism Working Group of the Spanish Society of Endocrinology. METHODS A systematic search was made in MEDLINE (PubMed), using the terms normocalcemic primary hyperparathyroidism and primary hyperparathyroidism, for articles in English published before 22 November 2012. Literature was reviewed by 2 members of the Bone Metabolism Working Group of the Spanish Society of Endocrinology, and after development of recommendations, the manuscript was reviewed by all other members of the Group, and their suggestions were incorporated. CONCLUSIONS The document provides practical recommendations for evaluation and follow-up of patients with normocalcemic primary hyperparathyroidism. There is however little evidence available about different aspects of this disease, mainly progression rate and clinical impact. More data are therefore needed before definite recommendations may be made.
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