Application of clinical and ultrasound-based model in evaluating the severity of secondary hyperparathyroidism / 中华超声影像学杂志

Objective:To analyze the gray-scale ultrasound and contrast-enhanced ultrasound features in secondary hyperparathyroidism (SHPT) to construct a clinical and ultrasound-based model, and to investigate the relationship between this model and serum intact parathyroid hormone(iPTH) level in order to find proper indicators for evaluation of the severity of SHPT.Methods:From February 2016 to March 2021, a total of 59 SHPT patients with 181 parathyroid glands (PTGs) admitted to the First Affiliated Hospital of Sun Yat-Sen University were enrolled. Gray-scale ultrasound and contrast-enhanced ultrasound were performed in every participant. Patients were divided into low-iPTH group ( iPTH<800 ng/L) and high-iPTH group (iPTH≥800 ng/L) according to the serum iPTH level. The characteristics of gray-scale ultrasonic imaging and contrast-enhanced ultrasonic imaging were analyzed by 2 sonographers.Biochemical parameters were collected and combined with ultrasonic characteristics to construct the clinical and ultrasound-based model. The relationship between the model and serum iPTH level was analyzed by multivariate linear regression (stepwise). Independent influencing factors on serum iPTH level was investigated in SHPT patients without iPTH-reducing drugs using history.Results:There were 19 patients in low-iPTH group and 40 patients in high-iPTH group.Serum calcium, serum phosphorus, serum creatinine, PTG number, total PTG volume, blood scores, calcification and cysts scores, CEUS scores (washing-in phase and washing-out phase) were significantly different between two groups(all P<0.05). The multivariate linear regression (stepwise) showed that serum phosphorus, total PTG volume and blood scores were independently related with serum iPTH level (standardized β coefficient were 0.387, 0.254 and 0.242 respectively; all P<0.05). Conclusions:Serum phosphorus, total PTG volume and blood scores are independent influencing factors on serum iPTH level. Ultrasonography combined with clinical parameters can help evaluate the severity of SHPT more accurately.

Predictive value of serum corrected calcium and iPTH levels for hypoparathyroidism after total thyroidectomy / 中华地方病学杂志

Objective:To explore the predictive value of serum corrected calcium and intact parathyroid hormone (iPTH) for hypoparathyroidism after total thyroidectomy.Methods:A prospective study was used to select 86 patients with papillary thyroid carcinoma who underwent total thyroidectomy and central lymph node dissection in Chizhou people's Hospital from June 2017 to June 2019 as the observation objects, and the occurrence of postoperative hypoparathyroidism and its risk factors were analyzed. According to the occurrence of postoperative hypoparathyroidism, the patients were divided into hypoparathyroidism group and non-hypoparathyroidism group, the levels of serum corrected calcium and iPTH of patients in two groups were compared before operation, 1, 3 days after operation, and during follow-up (6 months after operation). Receiver operating characteristic (ROC) curve was used to evaluate the predictive value of serum corrected calcium and iPTH levels in patients with hypoparathyroidism after total thyroidectomy on the first day after surgery.Results:Among 86 patients with papillary thyroid carcinoma, 17 were males and 69 were females, aged (46.3±5.6) years old; 42 patients had postoperative hypoparathyroidism (48.84%); among them, 32 cases (37.21%) had hypocalcemia in different degrees, and 2 cases (2.33%) had permanent hypoparathyroidism. Logistic analysis showed that extraglandular invasion [odds ratio ( OR)=19.28, 95% confidence interval ( CI): 2.63-136.81], bilateral central lymph node dissection ( OR=1.84, 96% CI: 1.36-9.13) were risk factors for hypoparathyroidism after total thyroidectomy. There were no significant differences in serum corrected calcium and iPTH levels between hypoparathyroidism group and non-hypoparathyroidism group before and 6 months after operation ( P > 0.05); the serum corrected calcium and iPTH levels in the hypoparathyroidism group were significantly lower than those in non-hypoparathyroidism group 1 and 3 days after operation ( P < 0.01). The ROC curve results showed that the area under the curve (AUC) of serum corrected calcium was 0.724, the sensitivity and specificity were 76.68% and 62.14%, respectively; the AUC of iPTH was 0.947, the sensitivity and specificity were 97.68% and 92.14%, respectively. Conclusion:Extraglandular invasion and bilateral central lymph node dissection are risk factors for hypoparathyroidism after total thyroidectomy, and the iPTH level is a more reliable predictor of hypoparathyroidism.

Factors associated with length of hospital stay among dialysis patients with nontraumatic acute abdomen: a retrospective observational study

INTRODUCTION@#Nontraumatic acute abdomen (NTAA) in dialysis patients is a challenging issue. The aetiologies of NTAA vary considerably depending on the renal replacement therapy (RRT) modality. Although haematological parameters and contributing factors have been reported to be associated with outcomes for dialysis patients, their clinical effect on the length of hospital stay (LOS) remains unknown.@*METHODS@#We retrospectively analysed 52 dialysis patients (peritoneal dialysis [PD], n = 33; haemodialysis [HD], n = 19) and 30 non-dialysis patients (as controls) between January 2011 and December 2014. To attenuate the selection bias, non-dialysis patients with NTAA were matched to cases at a ratio of 1:1 by age, gender and comorbidities (diabetes mellitus and hypertension). Their demographic characteristics, laboratory data, clinical assessment scores and LOS were analysed.@*RESULTS@#The PD group exhibited a significantly higher neutrophil percentage, neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR); longer LOS; and lower lymphocyte percentage and absolute lymphocyte count than the control group. After multivariate analysis adjustment, female gender, longer RRT duration and higher intact parathyroid hormone (iPTH) levels were associated with a lower probability of being discharged home. In the dialysis group, a higher iPTH level (> 313 μg/mL) was positively correlated with longer LOS. iPTH level combined with NLR can be used as a surrogate marker for predicting longer LOS (p < 0.001).@*CONCLUSION@#NTAA dialysis patients with female gender, longer RRT duration and higher iPTH levels are prone to experiencing longer LOS. In addition, the combination of iPTH and NLR is a significant determinant for LOS in NTAA dialysis patients.

A study of secondary hyperparathyroidism in patients with chronic kidney disease in a tertiary care hospital

Background: Secondary hyperparathyroidism (SHPT) is one of the less recognized complications in patients with chronic kidney disease (CKD). The prevalence of SHPT in various stages of CKD was evaluated by measuring the levels of intact parathyroid hormone (iPTH).Methods: This cross-sectional study was carried out in 100 CKD patients. Serum creatinine, calcium, phosphorous and iPTH levels were measured and statistical analysis was carried out using the SPSS software (IBM, NY, USA).Results: Among the 100 participants, the mean age (SD) was 59.3 (7.8) years. In our study population, 52% were men and the rest were females. Hypertension (75%) was the most common chronic morbidity. Prevalence of hyperparathyroidism among chronic kidney disease patients was 22% (95% CI: 14.7-30.9%). The prevalence of secondary hyperparathyroidism among dialysis and non-dialysis patients were 30% and 14% respectively which was statistically significant.Conclusions: SHPT is an important complication which is often underdiagnosed. Secondary hyperparathyroidism starts to develop when eGFR falls below 60ml/min. PTH levels starts to rise as the disease progress. Hence it is important for the treating physicians to monitor the PTH levels early in the course of CKD to prevent and treat bone mineral disease.

Application of total parathyroidectomy with autotransplantation in secondary hyperparathyroidism / 中华内分泌外科杂志

Objective To evaluate the clinical safety and effectiveness of total parathyroidectomy with autotransplantation on the chronic renal failure (CRF) patients who are suffering from severe secondary hyperparathyroidism (SHPT).Methods A retrospective analysis was performed on 149 patients with secondary hyperparathyroidism who were given total parathyroidectomy with autotransplantation from Apr.2010 to Oct.2015.The changes of clinical symptoms,parathyroid hormone,calcium and phosphate blood levels were followed up during 6 months to 6 years.Results 598 parathyroid glands were obtained form 149 patients who underwent surgical resection.Musculoskeletal pain and skin itching relieved or disappeared in 145 cases the 2nd day after operation,while these symptoms gradually relieved one week after operation for 4 cases.Serum intact parathyroid hormone (iPTH)was 89.67±180.61,serum phosphate 1.74±0.52,and serum calcium 2.07±0.32 the 1st day after operation,and they all decreased compared with those before operation(P＜0.001).Serum calcium,phosphorus and iPTH levels were similar at 6,36 and 60 months after operation (P＞0.05).Two patients had pathological fracture after operation.No persistent bone pain or skin itching was found during the follow-up period.Two patients had secondary hyperparathyroidism.Six patients had recurrence,among whom five underwent surgery again,and one patient had clinical follow-up.One patient died of pulmonary infection at 13 months after operation.Conclusion Total parathyroidectomy with autotransplantation were applied to ineffective medical treatment for advanced secondary hyperparathyroidism in patients with chronic renal failure.

Management of Chronic Kidney Disease-Mineral Bone Disorder with Sevelamer Hcl Phosphate Binder in Korean Patients with Dialysis

BACKGROUND: Sevelamer is associated with reduced complications of chronic kidney disease-mineral bone disorder (CKD-MBD) resulted from hyperphosphatemia, which may contribute mortality, in CKD patients with dialysis. So far clinical outcomes of sevelamer on mortality and risk of cardiovascular mortality related to CKD-MBD are debating. Purpose of this study was to evaluate the effectiveness of sevelamer HCl on mortality of secondary hyperparathyroidism (SHPT), risk of cardiovascular mortality and, frequency of osteopathy in end stage renal disease (ESRD) patients with dialysis. METHODS: We retrospectively reviewed the electronic medical records of 536 patients with ESRD, who were admitted for moderate to severe SHPT, for 36 months. 75 patients who met inclusion criteria were evaluated for the efficacy of sevelamer (mean serum iPTH = 487.5 pg/mL). RESULTS: Sevelamer intervention was not associated with increased three-year survival time compared with non-sevelamers group [average survival month: 30.4 months in sevelamer group, 26.8 months in non-sevelamer group, p = 0.463]. Sevelamer intervention was not associated with significant mortality benefit and cardiovascular mortality benefit as compared to non-sevelamer group [sevelamer group: non-sevelamer group, all-cause mortality (iPTH > 600 pg/mL): 14.3% (1/34): 20% (1/41) p = 0.962, OR = 0.935, 95% CI, 0.058-14.98, heart disease mortality: 6.67% (2/30): 0% (0/32) p = 0.138]. Sevelamer was not associated with significantly lower cumulative incidence of osteopathy compared to non-sevelamer group (sevelamer group: non-sevelamer group, 5.9% (2/34):9.8% (4/41); p = 0.538; OR = 0.578; 95% CI, 0.099-3.367). CONCLUSION: Sevelamer was not associated with decreased all-cause mortality and risk of cardiovascular mortality compared to non-sevelamer group in ESRD patients with SHPT.

Influence of sample collection and storage on detection of iPTH in patients with hemodialysis / 国际检验医学杂志

Objective To evaluate the influence of sample collection and storage on the detection results of intact parathyroid hormone(iPTH).Methods 10 blood samples from the hemodialysis patients were simultaneously injected into four types of blood collection tube:pro-coagulation tube,blank tube,EDTA tube and sodium citrate tube.The iPTH levels in the fresh samples within 4 h after blood collection and serum/plasma preserving for 12,24,48 h under 4OC were detected by the Roche cobase411 immunoas-say instrument.Results Serum iPTH in the pro-coagulation tube within 4 h after blood collection was rapidly degraded,while the iPTH level in the blank tube was highest,which was significantly higher than that the serum/plasma preserved for 12,24,48 h.The iPTH level in the EDTA tube and the sodium citrate tube began to degrade only at 48 h.Conclusion It is the first time to reveal that the coagulant has the degrading or inhibiting effect on serum iPTH,which verifies that the EDTA tube is the optimal blood col-lection tube.

Hiperparatiroidismo primario normocalcémico

Presentamos las características clínicas, bioquímicas y densitométricas de 35 pacientes con hiperparatiroidismo primario (HPP) normocalcémico, que se caracteriza por un nivel elevado de hormona paratiroidea intacta (PTHi) con el calcio sérico y iónico persistentemente normales, una vez descartadas posibles causas de hiperparatiroidismo secundario. Del total, 30 fueron mujeres (90%) y 5 varones (10%). Se seleccionó un grupo control de 55 pacientes con hiperparatiroidismo primario hipercalcémico: 51 mujeres (93%) y 4 varones (7%). El promedio de edad al diagnóstico de HPP normocalcémico fue de 61.4 ± 11.7 años y del HPP hipercalcémico de 56.4 ± 11.3 años. Además de las diferencias esperables de la calcemia, el calcio iónico, el fósforo y la calciuria de 24 horas, no encontramos cambios significativos en el resto de las variables bioquímicas. Tampoco encontramos diferencias en los valores densitométricos, la presencia de osteopenia u osteoporosis y el número de fracturas entre ambos tipos de HPP. Sí hubo una diferencia significativa en la presencia de litiasis renal entre el HPP normocalcémico (11.4%) vs el HPP clásico (49.1%), p < 0.0005, en parte vinculada a la presencia de hipercalciuria en el HPP clásico. Dos de los 35 pacientes con HPP normocalcémico evolucionaron al HPP hipercalcémico durante un seguimiento de 4 años. Nuestros resultados apoyan la hipótesis que el HPP normocalcémico podría ser una forma temprana del HPP clásico, teniendo ambos similares repercusiones clínicas a nivel renal y óseo.

This report shows our conclusions on the clinical, biochemical and densitometry characteristics of 35 normocalcemic primary hyperparathyroidism (PHPT) patients. This condition is defined by a high level of intact parathyroid hormone (iPTHI) with persistently normal serum and ionized calcium in the absence of secondary hyperparathyroidism. Our selection consisted of 30 women (90%) and 5 men (10%). The control group of 55 hypercalcemic patients with primary hyperparathyroidism included 51 women (93%) and 4 men (7%). The average age at diagnosis of normocalcemic PHPT was 61.4 ± 11.7 years and 56.4 ± 11.3 years in hypercalcemic PHPT. Besides the expected differences in serum calcium, ionized calcium, phosphorus and 24 h urinary calcium, we found no significant changes in other biochemical variables, and no differences in densitometry evaluations such as the presence of osteopenia or osteoporosis and the number of fractures in the two types of PHPT. But there was a significant difference in the presence of renal lithiasis between normocalcemic PHPT (11.4%) and clasic PHPT (49.1%) p < 0.0005, to some extent associated to the presence of hypercalciuria in classic PHPT. Two of the 35 patients with normocalcemic PHPT became classic hypercalcemic PHPT over a 4 year follow-up period. Our findings support the hypothesis that the normocalcemic PHPT could be an early stage of the classic PHPT, both having similar clinical effects to metabolic renal and bone levels.

Relationship between Vitamin D, Parathyroid Hormone, and Bone Mineral Density in Elderly Koreans

There is controversy regarding definition of vitamin D inadequacy. We analyzed threshold 25-hydroxyvitamin D (25[OH]D) below which intact parathyroid hormone (iPTH) increases, and examined age- and sex-specific changes of 25(OH)D and iPTH, and association of 25(OH)D and iPTH with bone mineral density (BMD) in elderly Koreans. Anthropometric parameters, serum 25(OH)D and iPTH, lumbar spine and femur BMD by dual-energy radiography absorptiometry (DXA) were measured in 441 men and 598 postmenopausal women. iPTH increased below serum 25(OH) of 36.7 ng/mL in men, but failed to reach plateau in women. Femur neck BMD above and below threshold differed when threshold 25(OH)D concentrations were set at 15-27.5 ng/mL in men, and 12.5-20 ng/mL in postmenopausal women. Vitamin D-inadequate individuals older than 75 yr had higher iPTH than those aged < or = 65 yr. In winter, age-associated iPTH increase in women was steeper than in summer. In conclusion, vitamin D inadequacy threshold cannot be estimated based on iPTH alone, and but other factors concerning bone health should also be considered. Older people seemingly need higher 25(OH)D levels to offset age-associated hyperparathyroidism. Elderly vitamin D-inadequate women in the winter are most vulnerable to age-associated hyperparathyroidism.

Diagnóstico clínico e laboratorial do hiperparatiroidismo secundário / Clinical and laboratory diagnoses of secondary hyperparathyroidism

O hiperparatiroidismo secundário (HPTS), observado nos doentes urémicos, apesar de se instalar desde estadios precoces da insuficiência renal,apresenta manifestações clínicas pouco específicas e frequentemente tardias. Para além da promissora técnica de avaliação da arquitectura trabecularóssea por tomografia quantitativa microcomputorizada os métodos imagiológicos são de escassa utilidade no diagnóstico das alterações ósseasassociadas ao HPTS. Ao longo dos últimos anos foram avaliados diversos marcadores bioquímicos da remodelação óssea e a respectiva utilidade nodiagnóstico não invasivo da osteodistrofia renal. Finalmente, é ainda discutido o eventual papel de factores locais (citoquinas e factores de crescimento) na modulação da remodelação óssea.

Secondary hyperparathyroidism represents one extreme of the spectrum of the bone and endocrine changes observed in uraemic patients, and may develop since early stages of renal failure. The clinical symptoms and signs are non-specific and the contribution of image evaluation in the diagnosis of secondary hyperparathyroidism is, frequently, misleading. In this review, in addition to the classic modulators of bone remodeling, like parathyroid hormone (and PTHfragments), calcitriol and calcitonin, the role of others local factors involved in osteoblast and osteoclast activation, like cytokines and growth factors, is alsodiscussed.

Functional Parathyroid Cyst: A case report / 대한내분비외과학회지

Parathyroid cysts are uncommon lesions of the neck and superior mediastinum, rarely large enough to be of clinical significance. They frequently present as a clinical diagnostic problem. They may mimic solitary thyroid nodule. They can be classified as either functioning or non-functioning depending on whether or not they are associated with hypercalcemia. Non-functioning or “true” cysts are those associated with normocalcemia (85%), whereas functioning or “pseudocysts” are those associated with hypercalcemia (15%). The presence of a high content of intact parathyroid hormone (intact PTH) in the cystic fluid on fine-needle aspiration (FNA), in conjunction with an elevated serum calcium and intact PTH is diagnostic of a functional parathyroid cyst. A functional parathyroid cyst usually requires surgical removal. We report herein one case of functional parathyroid cyst.