Hiperparatiroidismo ectópico: Detección de la localización mediastinal / Ectopic hyperparathyroidism. Detection of mediastinal localization

El tejido paratiroideo ectópico es una causa frecuente de recurrencia del hiperparatiroidismo (HPT) siendo de 16% en primarios y 14% en secundarios. La localización intratorácica representa el 20-35%, pero solo un 2% requiere una cirugía torácica. El objetivo fue analizar una cohorte de pacientes con diagnóstico de HPT mediastinal operados en un hospital de alta complejidad de Argentina. Se realizó un estudio retrospectivo de todos los operados por HPT entre enero de 2006 y julio 2019 en ese hospital. Se incluyeron aquellos que requirieron acceso torácico por HPT ectópico. En este período se trataron 728 pacientes con HPT primario y secundario. Seis con primario y 3 con secundario requirieron cirugía torácica. Se realizaron 6 videotoracoscopias (VATS) y 3 esternotomías, sin complicaciones graves. Se utilizó biopsia por congelación en todos y dosaje de paratohormona intraoperatoria (PTHi) en 8 casos, que descendió en promedio 65% respecto al valor basal. Se confirmaron 5 adenomas y 4 hiperplasias. La enfermedad paratiroi dea mediastinal representó el 1.65% (12/728), mientras que recibieron tratamiento quirúrgico en nuestra institución 1.24% (9/728). La biopsia por congelación y el descenso de PTHi resultan útiles para confirmar el foco y eventualmente disminuir el riesgo de recurrencia. La VATS es segura pero depende del entrenamiento y de la disponibilidad en el medio asistencial. Si bien el sestamibi es el método con mayor sensibilidad, se propone el uso de 18F-colina PET/TC ante la sospecha de HPT ectópico. La posibilidad de obtener conclusiones basadas en la evidencia requiere de estudios con mayor número de pacientes.

The ectopic parathyroid tissue is a frequent cause of recurrent hyperparathyroidism (HPT), accounting 16% in primary HPT and 14% in secondary cases. Although intrathoracic ectopic glands represent 25-35% of all ectopic cases, only 2% requires thoracic surgery. The aim of this study is to report a case series of patients with ectopic mediastinal HPT treated by thoracic approach in a private institution in Argentina. This is a retrospective analysis from January 2006 to June 2019. All patients diagnosed with ectopic hyperparathyroidism who required a thoracic surgical approach were included. During this period, 728 patients with primary HPT and secondary HPT were treated. Six with primary HPT and 3 with secondary HPT required a thoracic approach. Six video-assisted thoracoscopy surgeries (VATS) and 3 sternotomies were performed. None of them presented serious posoperative complications. Frozen section biopsy was used in all cases. iPTH was measured in 8 cases, with a mean drop of 65% after 15 minutes. Final pathology reports confirmed 5 adenomas and 4 hyperplasias. Our case series reported an incidence of 1.65% (12/728) mediastinal parathyroids, while 1.24% (9/728) received surgical treatment at our institution. Intraoperative frozen section and PTHi are useful to confirm the diagnosis and to avoid recurrences. Although VATS is a safe and efficient treatment option, it depends on surgical training and availability. In terms of diagnostic imaging resources, sestamibi remains the current gold standard. However, 18F-choline PET/CT may arise as a new diagnostic tool. The possibility of obtaining evidence-based conclusions requires studies with higher number of patients.

Vitamin d deficiency and paratohommonium increase in late postoperative gastric bypass in roux-en-y / Deficiência de vitamina d e elevação do paratohôrmonio no pós-operatório tardio de bypass gástrico em y-de- roux

ABSTRACT Background : Roux-en-Y gastric bypass patients can experience changes in calcium metabolism and hyperparathyroidism secondary to vitamin D deficiency. Aim : To evaluate nutritional deficiencies related to the calcium metabolism of patients undergoing gastric bypass with a 10-year follow-up. Method : This is a longitudinal retrospective study of patients submitted to Roux-en-Y gastric bypass at a multidisciplinary clinic located in the Brazilian southeast region. The study investigated the results of the following biochemical tests: serum calcium, ionized calcium, vitamin D, and parathormone (PTH). The generalized estimating equations (GEE) determined the nutritional deficiencies using a significance level of 5%. Results : Among the patients who finished the study (120 months), 82.86% (n=29) had vitamin D deficiency, and 41.94% (n=13) had high PTH. Postoperative time had a significant effect on PTH (p=0.0059). The percentages of patients with vitamin D, serum calcium, and ionized calcium deficiencies did not change significantly over time. Conclusion : One of the outcomes was vitamin D deficiency associated with secondary hyperparathyroidism. These findings reaffirm the importance of monitoring the bone metabolism of patients submitted to Roux-en-Y gastric bypass. HEADINGS: Calcium deficiency. Vitamin D deficiency. Secondary hyperparathyroidism.

Resumo Racional: Pacientes submetidos ao bypass gástrico em Y-de-Roux, podem apresentar alterações do metabolismo do cálcio e hiperparatireoidismo secundário à deficiência de vitamina D. Objetivo: Avaliar as deficiências nutricionais relacionadas ao metabolismo do cálcio de pacientes submetidos à bypass gástrico em Y-de-Roux, com seguimento de 10 anos. Método: Um estudo retrospectivo longitudinal foi conduzido com pacientes submetidos à bypass gástrico em Y-de-Roux, em uma Clínica Multidisciplinar no Sudeste do Brasil. Investigou-se a frequência do acompanhamento médico e nutricional e os exames bioquímicos de cálcio sérico, cálcio iônico, vitamina D e paratormônio (PTH). Para a análise das deficiências nutricionais, foram utilizadas as Equações de Estimativas Generalizadas (EEG), com nível de significância de 5%. Resultados: Dos pacientes que permaneceram no estudo até o final (120 meses), 82,86% (29), apresentaram níveis de deficiência de vitamina D e 41,94% (13) apresentaram PTH elevado. O efeito do tempo foi significativo para o PTH (p=0,0059). Para a vitamina D, cálcio sérico e cálcio iônico, o percentual de deficiência manteve-se constante ao longo do tempo, sem diferença significativa entre os tempos. Conclusão: A deficiência de vitamina D, associada ao hiperparatireoidismo secundário, foi um desfecho encontrado. Tais achados reafirmam a importância do cuidado com o metabolismo ósseo, em pacientes submetidos à bypass gástrico em Y-de-Roux.

High frequency of asymptomatic hyperparathyroidism in patients with fibromyalgia: random association or misdiagnosis? / Frequência elevada de hiperparatireoidismo assintomático em pacientes com fibromialgia: associação ao acaso ou erro diagnóstico?

ABSTRACT Fibromyalgia (FM) and hyperparathyroidism may present similar symptoms (musculoskeletal pain, cognitive disorders, insomnia, depression and anxiety), causing diagnostic confusion. Objectives: To determine the frequency of asymptomatic hyperparathyroidism in a sample of patients with FM and to evaluate the association of laboratory abnormalities to clinical symptoms. Methods: Cross-sectional study with 100 women with FM and 57 healthy women (comparison group). Parathyroid hormone (PTH), calcium and albumin levels were accessed, as well as symptoms in the FM group. Results: In FM group, mean serum calcium (9.6 ± 0.98 mg/dL) and PTH (57.06 ± 68.98 pg/mL) values were considered normal, although PTH levels had been significantly higher than in the comparison group (37.12 ± 19.02 pg/mL; p = 0.001). Hypercalcemic hyperparathyroidism was diagnosed in 6% of patients with FM, and 17% of these women exhibited only high levels of PTH, featuring a normocalcemic hyperparathyroidism, with higher frequencies than those expected for their age. There was no significant association between hyperparathyroidism and FM symptoms, except for epigastric pain, which was more frequent in the group of patients concomitantly with both diseases (p = 0.012). Conclusions: A high frequency of hyperparathyroidism was noted in women with FM versus the general population. Normocalcemic hyperparathyroidism was also more frequent in patients with FM. Longitudinal studies with greater number of patients are needed to assess whether this is an association by chance only, if the increased serum levels of PTH are part of FM pathophysiology, or even if these would not be cases of FM, but of hyperparathyroidism.

RESUMO A fibromialgia (FM) e o hiperparatireoidismo podem apresentar sintomas semelhantes (dores osteomusculares, distúrbios cognitivos, insônia, depressão e ansiedade) e causar confusão diagnóstica. Objetivos: Determinar a frequência de hiperparatireoidismo assintomático em uma amostra de pacientes com FM e avaliar a associação das alterações laboratoriais com a sintomatologia. Metodologia: Estudo transversal com 100 mulheres portadoras de FM e 57 mulheres saudáveis (grupo de comparação). Foram pesquisados os níveis de paratormônio (PTH), cálcio e albumina, além da pesquisa de sintomas no grupo com FM. Resultados: No grupo com FM, os valores médios de cálcio sérico (9,6 ± 0,98 mg/dL) e de PTH (57,06 ± 68,98pg/mL) foram considerados normais, embora os níveis de PTH tivessem sido significativamente maiores do que no grupo de comparação (37,12 ± 19,02 pg/mL; p = 0,001). O hiperparatireoidismo hipercalcêmico foi diagnosticado em 6% das pacientes com FM e 17% delas apresentaram apenas PTH elevado, o que caracterizou o hiperparatireoidismo normocalcêmico, frequências maiores do que esperada para a faixa etária. Não houve associação significativa entre hiperparatireoidismo e sintomas da FM, com exceção da epigastralgia, que foi mais frequente no grupo de pacientes com as duas doenças concomitantes (p = 0,012). Conclusões: Houve frequência elevada de hiperparatireoidismo em portadoras de FM quanto à população geral. Hiperparatireoidismo normocalcêmico também foi mais frequente em pacientes com FM. Estudos longitudinais e com maior número de pacientes são necessários para avaliar se trata-se apenas de uma associação ao acaso, se as elevações séricas do PTH fazem parte da fisiopatologia da FM ou, ainda, se não seriam casos de FM, e sim de hiperparatireoidismo.

Persistent disorders of mineral metabolism after one year of kidney transplantation / Alterações do metabolismo mineral e ósseo após um ano de transplante renal

Abstract Introduction: The persistence of mineral metabolism disorders after renal transplant (RT) appears to possess a negative impact over graft and patient's survival. Objectives: To evaluate the parameters of mineral metabolism and the persistence of hyperparathyroidism (HPT) in transplanted patients for a 12-month period after the procedure. Methods: Retrospective analysis of 41 transplants (18 women- 44%, mean age of 39 ± 15 years) performed in a University Hospital, evaluating changes of calcium (Ca), phosphorus (P) and parathyroid hormone (PTH) and the prevalence of persistent HPT. The patients were divided into two groups accordingly to PTH levels prior to Tx: Group 1 with PTH ≤ 300 pg/mL (n = 21) and Group 2 with PTH > 300 pg/mL (n = 20). The persistency of HPT after transplant was defined as PTH ≥ 100 pg/mL. The evolution of biochemical parameters and the persistency of HPT were analyzed in each group after 1 year of transplant. Results: After a one-year of follow up, 5% of the patients presented hypophosphatemia (p < 2.7 mg/dL), 24% hypercalcemia (Ca > 10.2 mg/dL) and 48% persistency of HPT (PTH ≥ 100 pg/mL). There was a positive correlation between the PTH pre and post Tx (r = 0.42/p = 0.006) and a negative correlation between PTH and Ca pre-Tx (r = -0.45/p = 0.002). However, there was no significant difference among groups 1 and 2 regarding PTH levels pre and post Tx. Conclusion: The findings in this article suggest that mineral metabolism alterations and the persistency of HPT may occur after one year of renal Tx, mainly in patients which present high PTH levels prior toTx.

Resumo Introdução: A persistência de distúrbios do metabolismo mineral ósseo após o transplante renal (Tx) parece possuir um impacto negativo sobre a sobrevida do enxerto e do paciente. Objetivos: avaliar os parâmetros do metabolismo mineral e a persistência de hiperparatiroidismo (pHPT) 12 meses após o Tx. Métodos: Análise retrospectiva de 41 transplantes (18 mulheres- 44%, idade de 39 ± 15 anos) realizados em um Hospital Universitário, avaliando cálcio (Ca), fósforo (P), hormônio da paratireóide (PTH) e a prevalência de pHPT. Pacientes foram divididos em dois grupos de acordo com os níveis de PTH pré Tx: Grupo 1: PTH ≤ 300 pg/ml (n = 21) e Grupo 2: PTH > 300 pg/ml (n = 20). pHPT foi definida como PTH ≥ 100pg/mL após o Tx. A evolução dos parâmetros bioquímicos e a pHPT foram analisadas após 1 ano de Tx. Resultados: após um ano, 5% dos pacientes apresentaram hipofosfatemia (p < 2,7mg/dL), 24% hipercalcemia (Ca > 10,2 mg/dL) e 48% persistência de HPT (PTH ≥ 100 pg/mL ). Houve correlação positiva entre PTH pré e pós Tx (r = 0,42/p = 0,006) e correlação negativa entre PTH e Ca pré-Tx (r = -0,45/p = 0,002). Entretanto, não houve diferença significativa entre os grupos 1 e 2 em relação aos níveis de PTH pré e pós-Tx. Conclusão: Os resultados sugerem que alterações do metabolismo mineral e a pHPT podem ocorrer após um ano do Tx, principalmente em pacientes com níveis elevados de PTH pré-Tx.

Primary hyperparathyroidism in children and adolescents.

Objective. Primary hyperparathyroidism (PHPT) in children and adolescents is a rare condition. Awareness should improve in order to lower threshold for screening and allow intervention before serious and permanent sequelac occur. Methods. A retrospective analysis of 15 children and adolescents with PHPT (age <20 yr) seen in our clinic between 1993 and 2006. Results. Mean age of patients was 17.73 yr (Range - 13-20, Male-3: Female-12). Average duration of symptoms was 18.87 (range: 0-48) mo. Clinical features at presentation included bone pain (86.67%), proximal myopathy (46.67%), bony deformities (53.33%), fractures (60%), palpable osteitis fibrosa cystica (33.3%), renal calculi (40%), palpable neck swelling (13.3%) and acute pancreatitis (6.67%). None had positive family history or features suggestive of multiple endocrine neoplasia (MEN). After biochemical confirmation, tumor was localised in all prior to surgery. Histopathology confirmed adenoma in all cases. Post-operative hungry bone syndrome occurred in 33.3%. Conclusion. PHPT is more common in females. Presentation of the disease is similar to their adult counterparts except for more severe bone disease and less severe renal disease. MEN and familial non-MEN PHPT do not constitute a major cause of pediatric PHPT as against to worldwide data. The incidence of hyperplasia as a cause of PHPT is rare in our pediatric population.

Correlation of anemia, secondary hyperparathyroidism with left ventricular hypertrophy in Chronic Kidney Disease patients.

AIMS: To demonstrate the correlation of anemia and intact parathormone with left ventricular hypertrophy in a cohort of Chronic Kidney Disease (CKD) patients in a tertiary care centre. METHODS: A cross-sectional study was done over 2 years on 230 renal failure patients (160 males, 70 females), aged 15-75 years, who had elevated serum creatinine and reduced GFR. The patients were assessed based on clinical history and a number of laboratory parameters including serum creatinine, calcium, iPTH level, Hb, Hct, GFR and LVMI. Settings : Patients were seen as inpatients and outpatients in a tertiary care centre. RESULTS : In CKD stages I, II and III, 51% of the patients had anemia Hb<11gm/dl), 16%of the patients had elevated iPTH, 79% of male patients and 71% of female patients had LVH. In Stage IV CKD, 55% of the patients had anemia, 25% of the patients had elevated iPTH, 74% of male patients and 100% of female patients had LVH. In stage V CKD, 76% of the patients had anemia, 31% of the patients had elevated iPTH, 77% of male patients and 96% of female patients had LVH. In all five stages, 78% of male patients and 71% of female patients with elevated iPTH had LVH, 81% of male patients and 90% of female patients with anemia had LVH. Systemic hypertension was present in 69% of the patients. CONCLUSION: Anemia is widely prevalent in our cohort of CKD patients. Severity of anemia is correlated to LVH and secondary hyperparathyroidism in these patients.

Clinical spectrum of primary hyperparathyroidism

Primary hyperparathyroidism [1HPT] is now being diagnosed with increasing frequency. Simultaneously there has been an apparent change in the presentation of the disease and indications for surgery. The aim of this study was to examine the clinical presentation, indications for surgery, and outcomes of neck explorations for primary hyperparathyroidism. This study was carried out over a 12 year period, January 1990 to April 2002 at Jordan University Hospital, Amman, Jordan. Information on the indications, procedure performed, pathology and complications of all neck explorations for 1HPT was obtained from a retrospective thyroid/parathyroid surgical database. A minimum of 12 months follow-up was required in order to determine outcome of surgery. Out of 40 patients diagnosed with primary hyperparathyroidism at Jordan University Hospital, Amman, over 12 years, 14 patients [35%] diagnosed 4 years after the onset of their disease. Severe bone disease was the main indication for surgery in 28 patients; 5 patients with fractured bones, 2 patients with bone cysts, 3 patients with brown tumors and severe osteoporosis and backache in 22 patients; renal calculi in 10 patients; muscle ache and weakness in 14 patients; acute pancreatitis in one patient and asymptomatic HPT following biochemical screening in one patient. Two patients continued to have persistent hypercalcemia after the first operation; one of them has been cured by reoperation for an ectopic parathyroid in the anterior mediastinum resulting in an overall cure rate of 97.5%. This study showed that severe bone disease with fractures, bone cysts and brown tumors are still the most common presentation of primary hyperparathyroidism in Jordan; this is most likely due to delay in diagnosis and initiation of treatment. It is important to screen for hyperparathyroidism in high risk patients and to refer these patients to specialized centers for proper management

Hiperparatiroidismo primario y embarazo / Primary hyperparathyroidism and pregnancy

El hipertiroidismo primario (HPP) durante el embarazo, hasta el año 1990 había sido reportado en 109 casos con un subdiagnóstico importante ya que esta patología puede permanecer asintomática por muchos años o enmascararse por la disminución fisiológica de la calcemia durante el embarazo. Su detección es importante porque se asocia a parto prematuro, mortinatos, tetania neonatal y daño renal materno progresivo e irreversible entre otras complicaciones. El objetivo de este trabajo fue actualizar los conocimientos de HPP durante el embarazo y mostrar un caso clínico diagnosticado y manejado en el Hospital Base de Puerto Montt en 1995. Sobre la base de la información obtenida, se concluye que durante el embarazo esta patología requiere de un manejo multidisciplinario y de resolución quirúrgica como tratamiento definitivo

Hiperparatiroidismo primario: nuestra experiencia / Primary hiperparathyroidism: our experience

Presentamos nuestra experiencia obtenida entre los años 1954 y 1992 con el tratamiento de 29 enfermos afectados de hiperparatiroidismo primario. Exponemos en todos los enfermos la sintomatología presente, los resultados obtenidos a través de los exámenes de calcio, fósforo y hormona paratiroidea en plasma, y calcio y fósforo en orina, como así también distintas radiografías óseas. Para la ubicación de las glándulas se efectuó, preoperatoriamente, ecografía, centellograma de sustracción adición y tomografía axial computada. La terapéutica efectuada consistió en la resección de los adenomas, la paratiroidectomía de tres glándulas o de tres glándulas y la mitad de la cuarta en las hiperplasias y la resección en bloque del tumor, con el lóbulo tiroideo homolateral, en los cánceres. En el postoperatorio, se siguió clínicamente a los pacientes, con los signos de Trousseau y Chvöstek y calcemia luego de las 24hs., efectuándose calcio intravenoso a los que presentaban hipocalcemia

Hiperparatiroidismo primario: nuestra experiencia / Primary hyperparathyroidism: our experience

Se presentan 46 pacientes portadores de hiperparatiroidismo primario operados entre 1979 y 1990 (31 adenomas, 11 hiperplasias, 4 carcinomas). La gravedad de las manifestaciones clínicas debida al diagnóstico tardío, condicionó una mortalidad de 8,7%. No hubo pacientes operados asintomáticos en esta serie. Se analizan los resultados de la ecografía, centellografía, tomografía computada y resonancia nuclear en la localización preoperatoria, y de azul de metileno en la atención intraoperatoria de las glándulas. El éxito terapeútico en la primera intervención fue de 93%. Hubo 2 persistencias y 1 recurrencia. La morbilidad fue de 2,17%. Se enfatiza la importancia de la labor multidisciplinaria para la obtención de buenos resultados

Carcinoma paratiroideo

La incidencia de hiperparatiroidismo causado por carcinoma de paratiroides (CP) ha sido estimada en soló 0.5 a 5 por ciento (1-11). Por esto se ha recomendado informar todos los casos que se detecten con el fin de elaborar un registro internacional que mejore el conocimiento sobre esta rara entidad. En este artículo se presentan dos pacientes con hiperpartiroidismo por CP evaluados por nuestro servicio, y con base en ellos se hace una corta revisión del tema.

El hiperparatiroidismo primario en 26 años del Hospital Universitario de Caracas / Primary Hyperparathyroidism in 26 years of the Hospital Universitario de Caracas

Analizamos la incidencia de 18 hiperparatiroidismos primarios en el Hospital Universitario de Caracas en un periódo de 26 años (1956-82). Creemos que la determinación rutinaria del calcio sérico, aumentará el número de pacientes sospechosos, los cuales requerirán estudios más específicos para confirmar el diagnóstico de hiperparatiroidismo. Nuestra serie mostró los siguientes resultados: 10 (55%) Adenomas; 3 (16%) Hiperplasias; 3 (16%) Glándulas normales; 2 (11%) Carcinomas. Estos resultados no coinciden con lo reportado por otros autores. Respectivamente en 3 casos donde la anatomía patológica reportó glándulas normales. Creemos que no fueron exhaustivamente estudiados. 18 cervicotomías exploradas fueron realizadas y solamente en 1 caso (5%) se continuó con una esternotomía mediana. El hipoparatiroidismo se presentó en 4 pacientes (22%) esto nos invita a la reflexión