Carcinoma de próstata y síndrome de secreción inadecuada de hormona antidiurética / Prostate carcinoma and syndrome of inappropriate antidiuretic hormone secretio

El cáncer de próstata es una causa extremadamente rara de síndrome de secreción inadecuada de hormona antidiurética (SIADH). Se trata de tumores agresivos asociados a un síndrome que puede aparejar consecuencias graves. Un paciente de 64 años fue diagnosticado de adenocarcinoma de próstata Gleason 4+3: 7 en 2014 y recibió terapia de bloqueo hormonal. En 2015 debió ser ingresado por hiponatremia sintomática y se le diagnosticó un SIADH, sin otra causa probable más que el cáncer de próstata. Sufrió rápida progresión de su enfermedad oncológica, llamativamente cuando su PSA se encontraba en valores normales, y falleció al corto plazo. Existe gran variabilidad clínica e histopatológica de los casos informados en la literatura de asociación de carcinoma de próstata y SIADH, sin embargo, todos coinciden en la agresividad de estos tumores. Estas características se presentan en tumores con diferenciación neuroendocrina, frecuentemente resistentes al tratamiento hormonal y que pueden presentar síndromes paraneoplásicos como el SIADH. El perfil de sus alteraciones moleculares se encuentra en estudio para el desarrollo de terapias target. La asociación de adenocarcinoma de próstata y SIADH es muy infrecuente y podría implicar diferenciación neuroendocrina. Por tal motivo es esencial una nueva biopsia del tumor o de sus metástasis a la progresión de la enfermedad para poder conducir un tratamiento adecuado de acuerdo a sus características morfológicas, inmunohistoquímicas y, en un futuro, moleculares.

Prostate cancer is an extremely rare cause of syndrome of inappropriate antidiuretic hormone (SIADH) secretion. These tend to be aggressive tumors and SIADH can carry serious clinical consequences. A 64 years old patient was diagnosed with Gleason 4+3: 7 prostate adenocarcinoma in December 2014 and received hormonal blockade therapy. By March 2015 he was admitted for symptomatic hyponatremia and SIADH secretion was diagnosed, with no other probable cause than prostate cancer. He suffered a rapid progression of his oncologic disease, surprisingly with PSA in normal range, and died in the short term. There is great clinical and histopathological variability in the cases reported in the literature of association of prostate carcinoma and SIADH. However, they all agree on the aggressiveness of these tumors. This characteristic is present in tumors that have neuroendocrine features. They are frequently resistant to hormonal treatment and may present with paraneoplastic syndromes such as SIADH. The profile of its molecular alterations is under study for the development of target therapies. The association of prostate adenocarcinoma and SIADH is very uncommon and could involve neuroendocrine differentiation. For this reason, it is essential to perform a new biopsy of the tumor or its metastases at the progressive disease in order to conduct an appropriate treatment according to its morphological, immunohistochemical and, in the future, molecular characteristics.

Syndrome of inappropriate antidiuretic hormone secretion related to Guillain-Barré syndrome after laparoscopic cholecystectomy / Síndrome da secreção inapropriada do hormônio antidiurético relacionada à síndrome de Guillain-Barré após colecistectomia videolaparoscópica / Síndrome de secreción inapropiada de hormona antidiurética relacionado con el síndrome de Guillain-Barré tras colecistectomía laparoscópica

Background and objectives: Guillain-Barré Syndrome is one of the most common causes of acute polyneuropathy in adults. Recently, the occurrence of Guillain-Barré Syndrome after major and minor surgical operations has been increasingly debated. In Guillain-Barré syndrome, syndrome of inappropriate antidiuretic hormone secretion and dysautonomy are generally observed after maximal motor deficit. Case report: A 44-year-old male patient underwent a laparoscopic cholecystectomy for acute cholecystitis. After the development of a severe headache, nausea, diplopia, and attacks of hypertension in the early postoperative period, a computer tomography of the brain was normal. Laboratory tests revealed hyponatremia linked to syndrome of inappropriate antidiuretic hormone secretion, the patient's fluids were restricted, and furosemide and 3% NaCl treatment was initiated. On the second day postoperative, the patient developed numbness moving upward from the hands and feet, loss of strength, difficulty swallowing and respiratory distress. Guillain-Barré syndrome was suspected, and the patient was moved to intensive care. Cerebrospinal fluid examination showed 320 mg/dL protein, and acute motor-sensorial axonal neuropathy was identified by electromyelography. Guillain-Barré syndrome was diagnosed, and intravenous immune globulin treatment (0.4 g/kg/day, 5 days) was initiated. After 10 days in the intensive care unit, at which the respiratory, hemodynamic, neurologic and laboratory results returned to normal, the patient was transferred to the neurology service. Conclusions: Our case report indicates that although syndrome of inappropriate antidiuretic hormone secretion and autonomic dysfunction are rarely the initial characteristics of Guillain-Barré syndrome, the possibility of postoperative syndrome of inappropriate antidiuretic hormone secretion should be kept in mind. The presence of secondary hyponatremia ...

Justificativa e objetivos: a síndrome de Guillain-Barré é uma das causas mais comuns de polineuropatia aguda em adultos. Recentemente, a ocorrência após grandes e pequenas intervenções cirúrgicas tem sido cada vez mais debatida. Na Guillain-Barré, a síndrome da secreção inapropriada do hormônio antidiurético e a disautonomia são geralmente observadas após déficit motor máximo. Relato de caso: paciente do sexo masculino, 44 anos, submetido a colecistectomia videolaparoscópica para colecistite aguda. Após desenvolver uma forte dor de cabeça, náusea, diplopia e ataques de hipertensão no período pós-operatório imediato, uma tomografia computadorizada do cérebro revelou-se normal. Os exames laboratoriais revelaram hiponatremia associada à síndrome de secreção inadequada de hormônio antidiurético; os líquidos foram restritos e tratamento com furosemida e NaCl a 3% foi iniciado. No segundo dia pós-operatório, o paciente desenvolveu dormência que se propagava a partir das mãos e dos pés, perda de força, dificuldade para engolir e respirar. Suspeitou-se de síndrome de Guillain-Barré e o paciente foi transferido para a unidade de tratamento intensivo. Exame do líquido cefalorraquidiano revelou 320 mg/dL de proteína e neuropatia axonal sensório-motora aguda foi identificada por eletromiografia. Síndrome de Guillain-Barré foi diagnosticada e tratamento intravenoso com imunoglobuliva (0,4 g/kg/dia, cinco dias) foi iniciado. Após 10 dias na unidade de terapia intensiva, durante os quais os parâmetros respiratório, hemodinâmico, neurológicos e laboratoriais voltaram ao normal, o paciente foi transferido para o serviço de neurologia. Conclusões: nosso relato de caso indica que, ...

Justificación y objetivos: el síndrome de Guillain-Barré es una de las causas más comunes de polineuropatía aguda en adultos. Recientemente, la aparición del síndrome de Guillain-Barré después de cirugías mayores o menores se ha convertido en objeto de debate cada vez mayor. En el síndrome de Guillain-Barré, generalmente se observan síndrome de secreción inapropiada de hormona antidiurética y disautonomía después de un déficit motor máximo. Relato de caso: paciente de sexo masculino, 44 años, sometido a colecistectomía laparoscópica por colecistitis aguda. Después de comenzar con un fuerte dolor de cabeza, náuseas, diplopía y ataques de hipertensión en el período postoperatorio inmediato, una tomografía computadorizada del cerebro del paciente se reveló normal. Las pruebas de laboratorio revelaron hiponatremia asociada con el síndrome de secreción inadecuada de hormona antidiurética; los líquidos se restringieron y se inició tratamiento con furosemida y NaCl al 3%. En el segundo día del postoperatorio, el paciente presentó adormecimiento que se propagaba desde las manos y los pies, pérdida de fuerza, dificultad para tragar y para respirar. Se sospechó síndrome de Guillain-Barré y el paciente fue derivado a la unidad de cuidados intensivos. El examen del líquido cefalorraquídeo reveló 320 mg/dL de proteína y mediante electromiografía se identificó neuropatía axonal sensorial y motora aguda. Se diagnosticó síndrome de Guillain-Barré y se inició el tratamiento intravenoso con inmunoglobulina (0,4 g/kg/día, durante 5 días). Después de 10 días en la unidad de cuidados intensivos, durante los cuales los parámetros respiratorio, hemodinámico, neurológico ...

Syndromes related to sodium and arginine vasopressin alterations in post-operative neurosurgery

BACKGROUND: Cerebral salt wasting syndrome (CSWS), syndrome of inappropriate antidiuretic hormone secretion (SIADH) and diabetes insipidus (DI) are frequently found in postoperative neurosurgery. PURPOSE: To identify these syndromes following neurosurgery. METHOD: The study included 30 patients who had been submitted to tumor resection and cerebral aneurysm clipping. Sodium levels in serum and urine and urine volume were measured daily up to the 5th day following surgery. Plasma arginine vasopressin (AVP) was measured on the first, third and fifth days post-surgery. RESULTS: CSWS was found in 27/30 patients (90 percent), in 14 (46.7 percent) of whom it was associated with a reduction in the levels of plasma AVP (mix syndrome). SIADH was found in 3/30 patients (10 percent). There was no difference between the two groups of patients. CONCLUSION: CSWS was the most common syndrome found, and in half the cases it was associated with DI. SIADH was the least frequent syndrome found.

INTRODUÇÃO: A síndrome perdedora de sal (SPS), síndrome da secreção inapropriada do hormônio antidiurético (SIADH) e diabetes insipidus (DI) são freqüentemente encontradas no pós-operatório de neurocirurgia. OBJETIVO: Identificar essas síndromes relacionadas à neurocirurgia. MÉTODO: Foram estudados 30 pacientes submetidos à ressecção de tumor (n=19) e clipagem de aneurisma (n=11) cerebral durante os primeiros cinco dias do pós-operatório. Os pacientes foram submetidos a dosagens diárias de sódio sérico e urinário até o 5° dia pós-operatório, com controle de volume urinário neste período e dosagem de arginina-vasopressina (AVP) plasmática no 1°, 3° e 5° dias pós-operatórios. RESULTADOS: A SPS foi encontrada em 27/30 pacientes (90 por cento), em 14/27 (46,7 por cento) associada à diminuição dos níveis de AVP plasmática (síndrome mista). A SIADH foi encontrada em 3/30 pacientes (10 por cento). Não houve diferença entre os dois grupos de pacientes. CONCLUSÃO: A SPS foi a síndrome mais freqüente, em metade de casos associada ao DI. A SIADH foi a menos freqüente.

Syndrome of inappropriate secretion of antidiuretic hormone associated with strongyloidiasis.

We report a case of syndrome of inappropriate secretion of antidiuretic hormone (SIADH) with accompanying severe strongyloidiasis in a 52-year-old male. On admission, he showed drowsiness and emaciation with severe hyponatremia. We gave sodium (saline or salts) in an i.v. drip infusion and orally without improvement. A urinalysis and plasma osmotic pressure test indicated SIADH, therefore, treatment was changed to restrict his sodium intake. The hyponatremia gradually improved initially, but the appetite loss, nausea, and hyponatremia continued. Endoscopy revealed white patches on the stomach wall and histopathological examination revealed infestation of the mucosal epithelium with numerous Strongyloides stercoralis larvae. Ivermectin treatment was then initiated and the abdominal symptoms and hyponatremia gradually resolved. We carefully investigated the underlying cause of the SIADH, such as disease of the central nervous system, lung cancer, and other malignancies, but no abnormality or clear cause could be found. We concluded that the patient developed SIADH secondary to severe S. stercoralis infection.

Cerebral salt wasting syndrome in a patient with a pituitary adenoma.

Cerebral salt wasting syndrome (CSWS) is often an unrecognized cause of hyponatremia that occurs in the setting of intracranial lesions. It is important to differentiate CSWS from the syndrome of inappropriate ADH secretion, as this would alter the management of hyponatremia. We describe a case of CSWS that occurred in association with a non-functioning pituitary adenoma.

Complicaçöes das cirurgias hipofisárias: análise de 120 cirurgias no HUCFF-UFRJ / Complications of pituitary surgery: analysis of 120 operations at HUCFF-UFRJ

Estudamos uma série de 108 pacientes, submetidos a 120 intervenções cirúrgicas para tratamento de tumores hipofisários realizadas no Hospital Universitário Clementino Fraga Filho (HUCFF) da Universidade Federal do Rio de Janeiro (UFRJ), no período de 1979 a julho de 1998, com o objetivo de analisar a morbidade e mortalidade pós-operatória imediata. A idade dos pacientes variou entre 15 e 70 anos. Os diagnósticos etiológicos foram: adenomas não secretores, 46 (38,34 por cento); acromegalia, 30 (25 por cento); prolactinoma, 29 (24,16 por cento) e doença de Cushing, 15 (12,5 por cento). As principais complicações endocrinológicas foram: pan-hipopituitarismo, 16 (13,34 por cento); diabetes insípidus central (DIC), 15 (12,5 por cento); hiposuparenalismo, 4 (3,34 por cento). Complicações neurocirúrgicas: infecção, 13 (10,84 por cento) e fístula liquórica, 6 (5 por cento). Ocorreram 2 óbitos (1,67 por cento). Nossos resultados se enquadram dentro dos encontrados na literatura internacional. Quando analisamos ano a ano esta casuística identificamos queda progressiva da morbimortalidade, demonstrando a importância não só da habilidade do neurocirgião, como da uniformidade da equipe que acompanha estes pacientes.

Water electrolyte homeostasis in acute bronchiolitis.

Children with acute bronchiolitis frequently require hospitalization and parenteral fluid therapy. Water retention due to impaired renal water excretion has been described in several pulmonary conditions in children. We studied 20 infants (3.6 +/- 2.9 months), hospitalized consecutively for acute bronchiolitis for water and electrolyte changes during the acute stage and compared them to those on recovery. Serum sodium and plasma osmolality, urinary sodium and osmolality were measured in all infants. Ten infants each were assigned alternatively to study body water compartment or renal water handling (water load excretion and free water excretion capacity) on the day of hospitalization and after recovery. Mean ( +/- SD) value of serum sodium of the infants at admission was 132.7 +/- 7.2 mEq/L which increased to 137.1 +/- 5.4 mEq/L on recovery (p < 0.05). Plasma osmolality changed from 284 +/- 14 mOsm/kg at admission to 294 +/- 10 mOsm/kg at recovery (p < 0.05). There was a significant decrease in urinary sodium from 54 +/- 39 mEq/L to 20 +/- 18 mEq/L and urinary osmolality from 415 +/- 213 mOsm/kg to 252 +/- 204 mOsm/kg at admission and at recovery, respectively. All 10 infants showed significant increase in total body water (mean +/- SD; 22.8 +/- 7.5 ml/kg) at admission as compared to that at recovery. The total body water (TBW) excess was mainly in extracellular water compartment (16.3 +/- 3.6 ml/kg). Seven of 10 infants had significant impairment in renal water excretion. Increase in maximum free water clearance of these 7 infants on recovery was 0.69 +/- 0.27 ml/min, i.e., 15 times more than that at admission. It is concluded that bronchiolitis of infancy is characterized by water retention which is caused by impaired renal water excretion. In the management of severe bronchiolitis careful attention to fluid therapy is mandatory; liberal fluid therapy may lead to water intoxication.

Serum sodium and osmolal changes in tuberculous meningitis.

Twenty children from 2 months to 7 years (mean age 2.74 years +/- 1.62) diagnosed to have tuberculous meningitis (TBM) were evaluated for serial serum sodium levels and osmolality of cerebrospinal fluid (CSF), serum and urine on admission and the results compared with 20 age and nutritionally matched controls, and these investigations repeated on day 3 and day 10. Mean serum sodium levels (130.7 +/- 6.26 mEq/L), and osmolality of CSF (272.0 +/- 7.0 mOsm/kg) and serum (275.5 +/- 6.09 mOsm/kg) were significantly lower (p < 0.001) than in controls. Hyponatremia was detected in 65% of cases on admission, 47% on day 3 and in 30.8% on day 10. All the patients with hyponatremia had biochemical evidence of syndrome of inappropriate secretion of antidiuretic hormone (SIADH) on admission. Incidence of SIADH gradually decreased to 41.2% on day 3 and 15.4% on day 10. In some of the cases serum sodium levels and osmolality of serum and CSF took about 3 weeks to return to normal. CSF osmolality was lower than concomitant serum osmolality in patients as well as in controls. In patients with SIADH, CSF osmolality followed the same trend as serum values and returned to normal in 2-3 weeks. Overall mortality was 25%. Two out of 3 patients who expired during first 3 days had SIADH but in those cases who survived there was no correlation with degree of meningeal inflammatory changes or ultimate outcome. SIADH is commonly associated with TBM and should be diagnosed early in order to modify the fluid therapy in these cases.(ABSTRACT TRUNCATED AT 250 WORDS)

Síndrome de secresión inapropiada de hormona a antidiurética: implicancias clínicas / Syndrome of secresion inappropiate of antidiuretic hormone: clinical implicate

El síndrome de secresión inapropiada de hormona antidiurética (SIADH) fue descubierto en 1957 y se le describió como un síndrome clínico caracterizado por hiponatremia, hiposmolaridad plasmática, pérdida renal de sodio y orina hiperosmolar con relación al plasma; asociado a diversas neoplasias, enfermedades infecciosas pulmonares y lesiones neurológicas. Por alta prevalencia del SIADH en pacientes de riesgo y el mal estado general la sintomatología de este síndrome podría ser atribuida a la enfermedad de fondo, no administrando el tratamiento adecuado y aumentando así la morbilidad de los pacientes. Se realiza una revisión de los criterios diagnósticos, los factores etiológicos, las manifestaciones clínicas, las diversas teorías que explican la fisiopatología del síndrome, el diagnóstico diferencial con otros tipos de hiponatremia y finalmente, el tratamiento sugerido.

Meningoencefalitis tuberculosa en niños: Diez años de experiencia en el Hospital Nacional Cayetano Heredia / Tuberculosis meningoencephalitis in children: Ten years experience at Hospital Nacional Cayetano Heredia

Se presenta 70 niños diagnosticados de MEC TBC entre enero de 1982 y diciembre de 1991. El analisis demostro una ocurrencia de 9.4 casos por año, Siendo los escolares el grupo etareo mas afectado, asi como el contacto tuberculoso, el hacinamiento y la desnutrición los antecedentes mas importantes. El tiampo con compromiso de conciencia transcurrido previo a la hospitalización fue el factor que determino el estadio clínico de ingreso y la condición de alta. La letalidad encontrada fue de 14.3 por ciento

Síndrome de Bartter

En 1962 Bartter y colaboradores describieron un síndrome caracterizado por la presencia de hipokalemia, alcalosis, hiperreninemia e hiperaldosteronismo con tensión arterial normal, asociados a hipertrofia del aparato yuxtaglomerular. Investigaciones posteriores han podido concluir que esta condición es la expresion común de por lo menos tres bien definidos defectos funcionales del tubulo renal. Existen en la literatura informes de casos de esta entidad (1,2), pero por ser poco común, por lo inusual de la presentacion y por las dificultades diagnosticas a las que nos enfrentamos, informamos este caso.

Syndrome of inappropriate antidiuretic hormone secretion in a patient with intrasellar neurofibroma of the sixth nerve

The syndrome of inappropriate antidiuretic hormone (SIADH) secretion has been described in a wide range of neurological and other disorders. We wish to add an extremely rare case of a solitary, large invasive neurofibroma of the sixth cranial nerve extensuvely destroying the sella turcica in the skull base and causing inappropriate secretion of antidiuretic hormone in a 44-year-old black man in the absence of neurofibromatosis.

The syndrome of inappropriate secretion of the antidiuretic hormone and self-induced water intoxication in Schizophrenic patients

Se ha encontrado que alrededor de 3 a un 5% de pacientes esquizofrénicos hospitalizados desarrollan un cuadro clínico compatible con la intoxicación por agua, producto de su ingestión excesiva y una secreción inadecuada de la hormona antidiurética. Entre las características sobresalientes de este trastorno del balance hídrico se incluyen las siguientes: psicosis o estados mentales que requieren medicamentos psicotrópicos; convulsiones generalizados o historial de trastornos convulsivos; niveles de sodio plasmático por debajo de lo normal, inmediatamente después de la convulsión; bajos niveles de osmolaridad plasmática; altos niveles de osmolaridad en la orina; hipostenuria; polidipsia manifiesta o amnesia de esta conducta que ocasionalmente se asocia con delirios hidrofílicos o polidipsia psicogénica. Se hace una breve revisión de la literatura, criterios diagnósticos, factores patofisiológicos y posibles medidas preventivas. En un estudio retrospectivo de nuestra población psiquíatrica en un período de ocho años, fueron encontrados solamente tres casos bien documentados de intoxicación por agua provocada por ingestión de agua excesiva y síndrome de secreción inadecuada de hormona antidiurética. Es nuestra opinión que la reportada baja incidencia de estos trastornos en nuestra población psiquiátrica se debe probablemente a que estos cuadros clínicos no son facilmente reconocidos o quizás a que existan factores desconocidos biológicos o transculturales que contribuyen a la ausencia de manifestación de estos trastornos del balance hídrico