Advances in Medical Treatment of Primary Aldosteronism / 中国医学科学杂志(英文版)

Primary aldosteronism (PA) is the most common form of secondary hypertension, with its main manifestations including hypertension and hypokalemia. Early identification of PA is extremely important as PA patients can easily develop cardiovascular complications such as atrial fibrillation, stroke, and myocardial infarction. The past decade has witnessed the rapid advances in the genetics of PA, which has shed new light on PA treatment. While surgery is the first choice for unilateral diseases, bilateral lesions can be treated with mineralocorticoid receptor antagonists (MRAs). The next-generation non-steroidal MRAs are under investigations. New medications including calcium channel blockers, macrophage antibiotics, and aldosterone synthase inhibitors have provided a new perspective for the medical treatment of PA.

Persistent and serious hyperkalemia after surgery of primary aldosteronism: A case report / 北京大学学报(医学版)

Hyperkalemia was one of the complications after primary aldosteronism surgery. Hyperkalemia after primary aldosteronism surgery was uncommon in clinical practice, especially persistent and serious hyperkalemia was rare. This complication was not attached great importance in clinical work. A case about persistent and serious hyperkalemia after primary aldosteronism adrenal adenoma surgery was reported and the patient was followed-up for fourteen months in this study. This patient had a laparoscopic adrenalectomy due to primary aldosteronism. Hyperkalemia was detected one month after surgery of this patient, the highest level of plasma potassium was 7.0 mmol/L. The patient felt skin itchy, nausea, palpitation. Plasma aldosterone concentration fell to 2.12 ng/dL post-operation from 35.69 ng/dL pre-operation, zona glomerulosa insufficiency was confirmed by hormonal tests in this patient after surgery. And levels of 24 hours urinary potassium excretion declined. Decrease of aldosterone levels after surgery might be the cause of hyperkalemia. Hyperkalemia lasted for 14 months after surgery and kalemia-lowering drugs were needed. A systemic search with "primary aldosteronism", "hyperkalemia", "surgical treatment" was performed in PubMed and Wanfang Database for articles published between January 2009 and December 2019. Literature review indicated that the incidence of hyperkalemia after primary aldosteronism surgery was 6% to 29%. Most of them was mild to moderator hyperkalemia (plasma potassium 5.5 to 6.0 mmol/L) and transient. 19% to 33% in hyperkalemia patients was persistent hyperkalemia. Previous studies in the levels of plasma potassium reached the level as high as 7 mmol/L in our case were rare. Whether hypoaldosteronemia was the cause of hyperkalemia was not consistent in the published studies. Risk factors of hyperkalemia after primary aldosteronism surgery included kidney dysfunction, old age, long duration of hypertention. This paper aimed to improve doctors' aweareness of hyperkalemia complication after primary aldosteronism surgery. Plasma potassium should be monitored closely after primary aldosteronism surgery, especially in the patients with risk factors. Some patients could have persistent and serious hyperkalemia, and need medicine treatment.

Long-term outcome after bilateral adrenalectomy in Cushing's disease with focus on Nelson's syndrome

ABSTRACT Objective We analyzed the clinical, biochemical, and imaging findings of adrenalectomized patients with Cushing's disease (CD) in order to compare the characteristics of those who developed Nelson's syndrome (NS) versus those who did not develop this complication (NNS), aiming to identify possible predictive factors for its occurrence. Subjects and methods We performed a retrospective review of the clinical records of a group of patients with CD who underwent TBA between 1974 and 2011. Results Out of 179 patients with CD, 13 (7.3%) underwent TBA. NS occurred in 6 of them (46%) after a mean of 24 months from the total bilateral adrenalectomy (TBA). Age at diagnosis, duration of Cushing's syndrome (CS) until TBA, and steroid replacement doses were similar in both groups. Initial urinary cortisol levels (24-hour urinary free cortisol [UFC]) were significantly higher in the NS group than in the NNS group (p = 0.009). Four patients in the NS group and three of those in the NNS group received radiotherapy before TBA (p = 0.26). Three patients in the NS group presented residual tumors before TBA, compared with none in the NNS group (p = 0.04). At 1 year after TBA, the median ACTH level was 476 ng/L (240-1500 ng/L) in the NS group and 81 ng/L (48-330 ng/L) in the NNS group (p = 0.0007). Conclusion In conclusion, a residual tumor before TBA, higher 24-hour UFC at diagnosis, and increasing ACTH levels within 1 year after TBA emerged as predictive factors of development of NS.

Challenging risk factors for right and left laparoscopic adrenalectomy: A single centre experience with 272 cases

ABSTRACT Purpose This study aimed to compare perioperative and postoperative results of right and left laparoscopic adrenalectomy (LA), and to evaluate the impact of challenging factors on these outcomes. Materials and Methods A total of 272 patient's medical records that underwent single side LA between October 2006 and September 2017 were retrospectively reviewed. The patients were divided into 2 groups according to operation side. Moreover, pheochromocytoma, metastatic masses and adrenal lesions >5cm in size were considered to be difficult adrenalectomy cases and the outcomes of these cases were compared between two groups. Results 135 patients (49.6%) underwent right LA and 137 patients (50.4%) underwent left LA. Operation time, estimated blood loss (EBL) and hospitalization time were similar between the groups (p=0.415, p=0.242, p=0.741, respectively). Although EBL was higher on the right side than the left (p=0.038) in the first 20 cases, after this learning period has been completed, there was no significant difference between the groups. In patients with pheochromocytoma, metastatic mass and a mass >5cm in size, despite bleeding complications were clinically higher on the right side, this difference was not statistically significant. Conclusions During the learning period of LA, EBL is higher on the right side. Due to the greater risk of bleeding complications on the right side even on the hands of experienced surgeons, extra care and preoperative planning are required in patients with pheochromocytoma, metastatic masses and masses >5cm in size.

Predictors of complication after adrenalectomy

ABSTRACT Purpose: To investigate risk factors for complications in patients undergoing adrenalectomy. Materials and Methods: A retrospective search of our institutional database was performed of patients who underwent adrenalectomy, between 2014 and 2018. Clinical parameters and adrenal disorder characteristics were assessed and correlated to intra and post-operative course. Complications were analyzed within 30-days after surgery. A logistic regression was performed in order to identify independent predictors of morbidity in patients after adrenalectomy. Results: The files of 154 patients were reviewed. Median age and Body Mass Index (BMI) were 52-years and 27.8kg/m2, respectively. Mean tumor size was 4.9±4cm. Median surgery duration and estimated blood loss were 140min and 50mL, respectively. There were six conversions to open surgery. Minor and major post-operative complications occurred in 17.5% and 8.4% of the patients. Intra-operative complications occurred in 26.6% of the patients. Four patients died. Mean hospitalization duration was 4-days (Interquartile Range: 3-8). Patients age (p=0.004), comorbidities (p=0.003) and pathological diagnosis (p=0.003) were independent predictors of post-operative complications. Tumor size (p<0.001) and BMI (p=0.009) were independent predictors of intra-operative complications. Pathological diagnosis (p<0.001) and Charlson score (p=0.013) were independent predictors of death. Conclusion: Diligent care is needed with older patients, with multiple comorbidities and harboring unfavorable adrenal disorders (adrenocortical carcinoma and pheocromocytoma), who have greater risk of post-operative complications. Patients with elevated BMI and larger tumors have higher risk of intra, but not of post-operative complications.

Experiência de 20 anos em adrenalectomia videolaparoscópica / Twenty-year experience in laparoscopic adrenalectomy

Introdução: As operações na glândula adrenal são realizadas para determinados cânceres, todas as massas biologicamente ativas, metástases, massas com mais de 4-5 cm encontradas incidentalmente e hiperplasia adrenal primária. Métodos: Estudo transversal e descritivo. Foram analisados os prontuários dos pacientes submetidos a adrenalectomia videolaparoscópica entre agosto de 1994 e novembro de 2014. Resultados: Foram realizadas 146 adrenalectomias videolaparoscópicas. Em 134 casos, foi realizada com sucesso, mas em 12 casos (8,2%), o procedimento foi convertido. Foram 97 pacientes do sexo feminino e 49 do sexo masculino, com idade variando de 9 a 81 anos (média de 46,7 anos). Foram removidas 56 adrenais direitas, 75 esquerdas e 15 bilaterais. O tamanho médio das adrenais foi de 5,7 cm, variando de 0,9 a 15 cm. A mediana do tempo de internação hospitalar pós-operatória foi de 4,5 dias. A mediana do tempo de cirurgia foi de 144 minutos. Houve complicações em 22,5% dos casos (maiores ­ casos em que houve conversão para cirurgia aberta, necessidade de reinternação hospitalar e óbito­ e menores), sendo 10,9% complicações intraoperatórias e 11,6% pós-operatórias. Apenas sete (4,7%) pacientes foram considerados complicações maiores. Conclusão: A cirurgia realizada em nosso serviço está de acordo com o descrito na literatura, com taxas aceitáveis de complicações, com motivos de conversão compatíveis e com as indicações totalmente aceitáveis e condizentes. A adrenalectomia videolaparoscópica é a cirurgia de escolha para patologias cirúrgicas da glândula adrenal, exceto em casos de carcinoma adrenal localmente invasivo com comprometimento de outras estruturas (AU)

Introduction: Adrenal gland surgery is performed for some types of cancer, all biologically active masses, metastases, masses larger than 4-5 cm found incidentally, and primary adrenal hyperplasia. Methods: A cross-sectional, descriptive study. Medical records of patients who underwent laparoscopic adrenalectomy from August 1994 to November 2014 were analyzed. Results: A total of 146 laparoscopic adrenalectomies were performed. In 134 cases, laparoscopic adrenalectomy was successfully performed, but in 12 cases (8.2%), the procedure was converted. There were 97 female patients and 49 male patients. Fifty-six right adrenal glands and 75 left adrenal glands were removed, and 15 patients had both of them removed. The average size of adrenal glands was 5.7 cm, ranging from 0.9 to 1.5 cm. The median length of postoperative hospital stay was 4.5 days, ranging from 1 to 55 days. The median surgery time was 144 minutes. There were 22.5% of complications (major ones ­ cases that required conversion to open surgery, hospital readmission, and death ­ and minor ones), of which 10.9% were intraoperative and 11.6% were postoperative. Only seven (4.7%) patients were classified as having major complications. Conclusion: The surgery performed in our department is consistent with the literature, showing acceptable rates of complications, compatible reasons for conversion, and completely acceptable and consistent indications. Laparoscopic adrenalectomy is the surgery of choice for diseases of the adrenal gland, except for locally invasive adrenal carcinoma compromising other structures (AU)

Therapeutic approach to Class II, Division 1 malocclusion with maxillary functional orthopedics

INTRODUCTION: Interceptive treatment of Class II, Division 1 malocclusion is a challenge orthodontists commonly face due to the different growth patterns they come across and the different treatment strategies they have available.OBJECTIVE: To report five cases of interceptive orthodontics performed with the aid of Klammt's elastic open activator (KEOA) to treat Class II, Division 1 malocclusion.METHODS: Treatment comprehends one or two phases; and the use of functional orthopedic appliances, whenever properly recommended, is able to minimize dentoskeletal discrepancies with consequent improvement in facial esthetics during the first stage of mixed dentition. The triad of diagnosis, correct appliance manufacture and patient's compliance is imperative to allow KEOA to contribute to Class II malocclusion treatment.RESULTS: Cases reported herein showed significant improvement in skeletal, dental and profile aspects, as evinced by cephalometric analysis and clinical photographs taken before, during and after interceptive orthodontics.

INTRODUÇÃO: o tratamento interceptor da má oclusão de Classe II primeira divisão é um desafio comum para os ortodontistas, em função dos diferentes padrões de crescimento que podem ser encontrados e das estratégias de tratamento disponíveis.OBJETIVO:apresentar cinco casos de interceptação da má oclusão de Classe II primeira divisão usando o ativador aberto elástico de Klammt (AAEK).MÉTODOS: o tratamento dessa má oclusão pode ser realizado em uma ou duas fases; e a utilização dos aparelhos ortopédicos funcionais, de acordo com suas indicações, pode minimizar as discrepâncias dentoesqueléticas, melhorando, consequentemente, a estética facial na primeira fase da dentição mista. O diagnóstico, a correta confecção do aparelho e a cooperação do paciente são a tríade indispensável para que o AAEK seja um coadjuvante no tratamento dessa má oclusão.RESULTADOS: os casos clínicos apresentaram melhora significativa nos aspectos esquelético, dentário e de perfil, evidenciada pelas análises cefalométricas e, no aspecto clínico, pelas fotografias pré- e trans-tratamento e após a interceptação.

Caso clí­nico: reactivación de psoriasis posterior a adrenalectomía por sí­ndrome de Cushing / Case report: psoriasis relapse following adrenalectomy for cushing syndrome

The relapse of autoimmune diseases following resolution of Cushing syndrome (CS) has been established with frequency, especially for thyroid disease. We present the case of a 39-year-old woman with a history of psoriasis vulgaris, with no other comorbidities. She presented a one-year of weight gain, high blood pressure, hypermenorrhea, pre-diabetes and dyslipidemia. During this period of time, the complete remission of psoriatic lesions was confirmed. The laboratory analysis demonstrated elevated free urinary cortisol in two opportunities, and a confirmatory low-dose dexamethasone test. Low ACTH levels were established (12,3pg/ml), and the abdominal images where compatible with a right adrenal adenoma of 3,0 x 2,3 cm, sothe patient underwent a laparoscopic right adrenalectomy with no complications. Her blood pressure, glucose and cholesterol levels improved following surgery. One month after surgery the patient developed new, generalized psoriatic plaques. The excess of glucocorticoids produced by the adrenal tumor could have controlled the immunopathogeny of psoriasis. By removing the tumor, with the consequent reduction of cortisol levels, a more severe relapse of her cutaneous disease occurred.

Lesión diafragmática durante la laparoscopia urológica transperitoneal / Diaphragmatic injury during transperitoneal urological laparoscopic surgery

Introduction: Capnothorax is a rare complication of urologic laparoscopy. However with the increasing use of this technique in a variety of urological procedures, this rare complication is a potential risk. Material and Methods: We analyzed a total of 786 urological procedures performed by transperitoneal laparoscopy in our center. All procedures were performed by the same surgeon: 213 adrenalectomy, 181 simple nephrectomies, 143 lymphadenectomies, 118 radical nephrectomies, 107 partial nephrectomies and 24 nephroure-terectomy. Results: A total of 6 patients (0.7 percent) present diaphragmatic lesions. The diaphragmatic repair was performed totally intracorporeal. One patient required the placement of a pleural drainage. No patient presented complications associated with diaphragmatic injury. Conclusion: Repair of diaphragmatic injury during transperitoneal laparoscopy can be performed successfully by this route. This technique is feasible, reproducible and reliable. This is the largest series reported by a single center.

Introducción: El capnotórax es una complicación infrecuente de la laparoscopía urológica. No obstante, con el uso cada vez mayor de esta técnica en una gran variedad de procedimientos urológicos, esta infrecuente complicación se presenta como un riesgo potencial. Material y Métodos: Se analizaron un total de 786 procedimientos urológicos realizados en forma laparoscópica por vía transperitoneal en nuestro centro. Todos los procedimientos fueron realizados por el mismo cirujano: 213 adrenalectomías, 181 nefrectomías simples, 143 linfadenectomías, 118 nefrectomías radicales, 107 nefrectomías parciales y 24 nefroureterectomías. Resultados: Un total de 6 pacientes (0,7 por ciento) presentaron lesiones diafragmáticas. La reparación diafragmática fue efectuada totalmente en forma intracorpórea. Un solo paciente requirió de la colocación de un drenaje pleural. Ningún paciente presentó complicaciones asociadas a la lesión diafragmática. Conclusión: La reparación de las lesiones diafragmáticas ocurridas durante la laparoscopía transperitoneal puede ser efectuada exitosamente por esta misma vía. Esta técnica es factible, reproducible y confiable. Esta es la serie más grande reportada por un solo centro.

Nelson's Syndrome

Nelson's syndrome is a potentially severe complication of bilateral adrenalectomy performed in the treatment of Cushing's disease, and its management remains difficult. Of all of the features of Nelson's syndrome, the one that causes most concern is the development of a locally aggressive pituitary tumour, which, unusually for pituitary disease, may occasionally cause death from the tumour itself. This feature is especially pertinent given the increasing use in Cushing's disease of laparoscopic bilateral adrenal surgery as a highly effective treatment modality to control cortisol-excess. Despite numerous studies and reports, there is no formal consensus of what defines Nelson's syndrome. Thus, some will define Nelson's syndrome according to the classical description with an evolving pituitary mass after bilateral adrenalectomy, whereas others will rely on increasing plasma ACTH levels, even in the absence of a clear pituitary mass lesion on MRI. These factors need to be borne in mind when considering the reports of Nelson's syndrome, as there is great heterogeneity, and it is likely that overall the modern 'Nelson's syndrome' represents a different disease entity from that of the last century. In the present paper, clinical and epidemiological features of Nelson's syndrome, as well as its treatment modalities, are reviewed.

A síndrome de Nelson (SN) é uma complicação potencialmente grave da adrenalectomia bilateral realizada para o tratamento da doença de Cushing e seu manejo permanece difícil. De todas as manifestações da SN, aquela que causa maior preocupação é o desenvolvimento de um tumor hipofisário localmente agressivo, que pode (pouco usualmente para a doença hipofisária) ocasionalmente causar a morte pelo próprio tumor. Este achado é especialmente pertinente, dado o uso cada vez mais freqüente na doença de Cushing, da adrenalectomia bilateral por via laparoscópica, uma modalidade terapêutica altamente efetiva para o controle do excesso de cortisol. Apesar de numerosos estudos e publicações, não existe um consenso formal sobre a definição da SN. Assim, alguns irão definir a SN de acordo com a descrição clássica, como uma massa hipofisária que evolui após a adrenalectomia bilateral, enquanto outros irão se basear nos níveis crescentes dos níveis de ACTH plasmático, mesmo na ausência de uma lesão ou massa hipofisária nitidamente visível à RM. Esses fatores precisam ser relembrados quando se avaliam as publicações sobre SN, na medida em que existe grande heterogeneidade, e é provável que no geral a "SN moderna" represente uma entidade patológica diferente daquela do século passado. Neste artigo, revisaremos achados clínicos e epidemiológicos da SN e também suas modalidades terapêuticas.

Síndrome de Nelson: relato de caso / Nelson's Syndrome: a case report

O objetivo deste artigo é apresentar e discutir alguns aspectos da patogênese, do diagnóstico clínico, hormonal e radiológico e do tratamento da síndrome de Nelson, com base no relato de um paciente típico portador da doença, no qual várias abordagens terapêuticas mostraram-se ineficazes.

The aim of this article is to present and discuss several aspects of the pathogenesis, the clinical, hormonal, and imaging diagnosis, and the treatment of Nelson's syndrome, based on a typical patient's report, in whom several therapeutic approaches were shown to be ineffective.

Histological changes of the contralateral adrenal cortex following unilateral adrenalectomy in male albino rat

Unilateral adrenalectomy [UA] is performed not only to treat adrenal tumors but also as part of radical nephrectomy. The aim of the present study was to detect the effects of UA on the contralateral adrenal cortex, to identify the primary zone that was affected by adrenalectomy and the time at which the gland was histologically stabilized. Forty adult male albino rats with average weight 150-200 gm were used in this study. The animals were divided into 5 groups. Twelve rats were sham-operated and served as control group [group I]. The remaining 28 rats underwent right UA and were sacrificed after 3 days, 1, 2, 3 weeks [groups II, III, IV, and V respectively]. At the planned times, the left adrenal glands were excised and specimens were prepared for light and electron microscopic studies. Morphometric study was done to measure the thickness and the surface area of the cells of the three classical zones of the adrenal cortex. The results showed frequent mitotic figures in the outer zone of zona fasciculata in group II which was not evident in all other groups. In group III, the thickness and the surface area of the cells of zona fasciculata showed highly significant increase. The cells of zona glomerulosa and fasciculata showed marked cytoplasmic vacuolation more in zona fasciculata. Group IV showed gradual decrease in size and vacuolation of the cells which reverted to near normal in group V; three weeks after UA, denoting stabilization of the adrenal cortex. Electron microscopic examination revealed enlarged mitochondria, dilated smooth endoplasmic reticulum and decreased lipid content in group-III, while near normal appearance was achieved in group V. These results suggested that the compensatory growth in the adrenal cortex following UA was due to both hyperplasia and hypertrophy, and that zona fasciculata is the primary zone responsible for this compensatory growth

Feocromocitoma: diagnóstico y resultados del tratamiento quirúrgico / Pheochromocytoma: diagnosis and results of the surgical treatment

Se realizó estudio prospectivo que incluyó a todos los pacientes con feocromocitoma, operados en el Servicio de Cirugía General del Hospital Clinicoquirúrgico ôHermanos Ameijeirasö, durante el período comprendido entre junio de 1984 y junio de 2000. Incluyó a 33 pacientes, 24 mujeres y 9 hombres. Predominó la afección en la tercera, cuarta y quinta décadas de la vida. La hipertensión arterial fue la manifestación clínica principal, presente en el 85(por ciento) de los casos; el incidentaloma y la neoplasia endocrina múltiple (NEM) IIA fueron otras formas de presentación. La tomografía axial computadorizada y el ultrasonido tuvieron una sensibilidad de 95 y 100 (por ciento), respectivamente, para el diagnóstico de la entidad. La adrenalectomía fue el tratamiento de elección y la lumbar (84,8 por ciento), la vía de abordaje más empleada. La apertura pleural fue el accidente más frecuente y las complicaciones predominantes fueron el neumotórax y el hematoma lumbar. El resultado final del tratamiento fue bueno en 28 pacientes (84,8 por ciento) y ocurrieron 2 fallecimientos (6,1 por ciento)(AU)

A prospective study that included all the patients with pheochromocytoma operated on at the General Surgery Service of Hermanos Ameijeiras Clinical and Surgical Hospital from June, 1984, to June, 2000, was conducted. 33 patients, 24 females and 9 males, were included. The affection predominated in the third, fourth and fifth decade of life. Arterial hypertension was the main clinical manifestation present in 85 percent of th cases. The incidentaloma and the multiple endocrine neoplasia (MEN) II A were other forms of presentation. Computed axial tomography and ultrasound had a sensitivity of 95 and 100 percent , respectively, for the diagnosis of the entity. Adrenalectomy was the elective treatment and the lumbar approach(84.8 percent ) was the most used. The pleural opening was the most frequent accident and the prevailing complications were pneumothorax and lumbar hematoma. The final result of the treatment was good in 28 patients (84.84 percent) and 2 deaths were registered (6.1 percent )(AU)

Surgery and anesthesia for pheochromocytoma--a series of 40 operations.

Pheochromocytoma is a catecholamine-producing tumor which can be life-threatening. A series of 40 operations in 39 pheochromocytoma patients at a tertiary hospital in Thailand from 1976 to 1997 was reported. The patients were 30 females and 9 males; aged 7-73 years. One man had 2 operations 5 years apart. The most common symptoms and signs were palpitation, headache and hypertension. Preoperative management consisted of control of blood pressure and restoration of intravascular volume by using prazosin, an alpha adrenergic blocker. New imaging techniques have improved the ability to localize the tumors; 20 were found in the right adrenal glands, 14 in the left, 1 patient had bilateral tumors, 4 in Organs of Zuckerkandl and 1 patient had metastatic liver nodules. The operative procedures were 39 laparotomies and 1 laparoscopic surgery. The surgical and anaesthetic procedures were presented, and nitroprusside was used to control intraoperative blood pressure. Removal of tumors was successful in all cases except for 1 mortality due to injury of the liver and massive blood loss. Other complications were postoperative pulmonary edema and renal vein thrombosis. One patient had MEN type 2 and five cases were malignant. Pheochromocytoma can be cured by surgery, but cooperation among surgeons, anesthesiologists and internists is very important.

Influence of gonadotropins on adrenalectomy induced changes in the testis of albino mouse.

Effects of adrenalectomy and administration of gonadotropins on cell counts of different cell types of spermatogenesis and morphology of the Leydig cells were studied in 30 day old mice. Adrenalectomy (duration, 12 days; age at autopsy 42 days) caused a significant decrease in the diameters of seminiferous tubules and Leydig cell nucleus and, cell counts of intermediate spermatogonia, round and elongated spermatids. Administration of FSH (75 micrograms/0.1 ml saline) + LH (25 micrograms/0.1 ml saline) everyday for 12 days to adrenalectomized mice restored testicular activity as revealed by significant increases in mean diameter of the Leydig cell nuclei and cell counts of intermediate spermatogonia and elongated spermatids over those of adrenalectomized mice. The results indicate that (i) testis of adrenalectomized mouse responds to gonadotropin treatment and (ii) impairment in gonadotropin secretion is possibly a major factor in inducing testicular regression following adrenalectomy.

Cirugía de la glándula suprarrenal / Surgery of the supradrenal gland

Es conocida en la literatura médica la baja incidencia de la patología suprarrenal. Constituyendo hoy en día un capítulo urológico fascinante. El objetivo de este trabajo es presentar la experiencia clínico-quirúrgica de la patología suprarrenal en nuestro hospital. Material y Métodos: Se revisaron 76 operados por patología suprarrenal primaria entre enero de 1969 y mayo de 1996. Resultados: de los 76 pacientes, 28 (36,8 por ciento) fueron feocromocitomas, seguidos por hiperaldosteronismo en 13 pacientes (17 por ciento), hipercortisolismo en 1 1 pacientes (14,5 por ciento). 5 pacientes (6,5 por ciento) se operaron por cáncer suprarrenal, 4 (5,2 por ciento) por metástasis, 4 (5,2 por ciento) fueron adenomas corticales, 3 hiperplasia nodulares, 2 hematomas, 2 linfangiomas quísticos, 2 angiomiolipomas, 1 paciente con tuberculosis y otro con lipoma periadrenal. De esto 76 pacientes 42 (55 por ciento) fueron mujeres y 34 varones. La edad promedio fue de 55,2 años, 50 pacientes (66 por ciento) se presentaron con clínica y/o laboratorio propios de su patología. El estudio endocrino, cuando se usó, permitió sospechar la patología en la mayoria de los casos 26 pacientes (34 por ciento) fueron nódulados no funcionables con tamaño promedio de 3,5 cm. siendo hallazgo por ECO y/o TAC en 16 casos (61,5 por ciento) distribuidos como 4 (25 por ciento) metástasis, 3 (19 por ciento) hiperplasias nodulares,3 (19 por ciento) adenomas corticales, 2 feocromocitomas, 1 cáncer, 1 an giomiolipoma, 1 hematoma y 1 linfangioma quístico. La TAC,ECO, cintigrafía, arteriografía y venografía permitieron (usando 1, 2 ó más de estos) el hallazgo o confirmación del diagnóstico, siendo la TAC el método más efectivo 10050 en los que se usó. El diagnóstico definitivo lo dió la histología en todos. El abordaje quirúrgico más usado fue la lumbotomía (87 por ciento) exepto para los feocromocitomas en los que se usó abordaje anterior. No hubo mortalidad operatoria y la morbilidad fue baja (2 por ciento). Concluciones: nuestra serie confinna que el diagnóstico de la patología adrenal puede ralizarse con bastante certeza en el preoperatorio. La TAC es el método de estudio de mayor rendimiento. Como procedimiento quirúrgico reglado, esta cirugía puede ser practicada con una baja morbimortalidad apoyada por un manejo perioperatorio adecuado estimulando su práctica como tratanúento electivo en diversas patologías adrenales

Efeito da adrenalectomia na síntese lipídica da glândula mamária de ratas lactentes / Effect of adrenalectomy in lipid synthesis of the mammary gland of rats infants

No período de lactação tem sido observado uma série de alterações fisiológicas, metabólicas e hormonais importantes para aumentar o aporte de substratos (glicose, aminoácidos, ácidos graxos, corpos cetônicos e triglicerídios) disponíveis na circulação para a glândula mamária, de forma a assegurar uma adequada produção de leite para o crescimento e desenvolvimento normal da cria. Tem sido demonstrado, em ratas, que durante a lactação ocorre aumento considerável na ingestão de alimentos (ao redor de 300 por cento) acompanhado de hipertrofia e hiperplasia das células epiteliais da mucosa do intestino, resultando em maior capacidade absortiva. Outros tecidos também sofrem hipertrofia, como foi verificado na glândula mamária, fígado, rim e coração. Ale´m disso, durante a lactação aumentam consideravelmente os batimentos e o débito cardiáco e o fluxo sangüíneo para a glândula mamária (aproximadamente 0,5 ml/min/g) favorecendo ainda mais a disponibilidade de substratos e hormônios para essa glândula. Assim, durante o aleitamento, essas alterações propiciam uma grande utilização de substratos pela glândula mamária, que é extremamente sensível a alterações hormonais e ao estado nutricional materno...

Tratamiento quirúrgico de los síndromes de hiperfuncion corticosuprarrenal / Surgical treatment of adrenal cortical hyperfunction syndros

Se presentan 20 pacientes adultos operados por hiperfunción corticosuprarrenalÑ 9 mostraron síndrome de Cushing (5 adenomas y 4 carcinomas), 6 hiperplasias por enfermedad de Cushing, 2 virilización, 2 hiperaldosteronismo y 1 feminización, confirmados por análisis de laboratorio. La TAC fue el método de localización preoperatorio de tumores adrenales más útil. Se encontró diferencia significativa en edad, duración de los síntomas y tamaño del tumor entre los pacientes con hipercortisolismo debido a adenoma y aquellos con carcinoma. La resección quirúrgica ofreció la curación a los pacientes con patología benigna, y un aceptable control de la enfermedad en carcinomas.

Tratamiento quirúrgico del feocromocitoma / Surgical treatment of the pheochromocytoma

Se presentan 13 pacientes operados por feocromocitoma. El diagnóstico se hizo en todos los casos con la determinación de ácido vainillilmandélico en orina. Inicialmente, los tumores se localizaron con urograma excretor y retroneumoperitoneo. A partir de 1979 se utilizó la tomografía axial computada en 11 casos con buenos resultados. También fue de utilidad el centellograma con MIBG I 131. Se obtuvo un adecuado bloqueo adrenérgico preoperatorio tanto con dibencilina como con prazosin. Doce pacientes presentaron feocromocitomas benignos, 3 de ellos bilaterales, y todos fueron resecados. El único caso de tumor maligno fue irresecable por invasión de la vena cava inferior y fue tratado con 2 dosis terapéuticas de MIBG I 131, manteniéndose asintomático a 15 meses de la última aplicación.