Endocrine Abstracts

Pheocromocytoma is a catecholamine-secreting tumor that arises from chromaffin cells of the adrenal medulla. In general, they are unilateral and the treatment of choise is complete surgical resection. Surgery and other medical procedures such as chemotherapy or radiotherapy may result in massive catecholamine release that can be fatal. Some form of preoperative pharmacologic preparation is indicated for all patients to control blood pressure, arrhytmia and promote intravascula...

Introduction: Thyroglossal duct cysts (TDC) are a very frequent congenital neck mass and are mostly benign. Papillary thyroid carcinoma (PTC) originating from a TDC represents an infrequent finding. Usually, the diagnosis is only made postoperatively after cyst’s excision.Case report: A 38-years old female patient was referred to the Endocrinology department due to Graves’ disease. She had been treated with antithyroid drugs for 18 months witho...

Objectives: Assess the efficacy and safety of ultrasound-guided percutaneous ethanol injection (PEI) for treating benign cystic or predominantly cystic-thyroid nodules (TN).Methods: Retrospective analysis of all euthyroid patients treated with PEI for purely (>90% of cystic component) or predominantly cystic (50%-90% of cystic component) TN between January 2018 to February 2023. Efficacy was defined as 50% or greater reduction in pretreatment volume ...

Most of adrenocortical tumors (ACT) are benign and non-functioning tumors, in contrast to adrenocortical carcinomas (ACC), which are rare and usually very aggressive tumors with a poor prognosis. The pathological discrimination between adrenocortical adenomas (ACA) and ACC is mainly based on unspecific and subjective histological features, resulting in inaccurate diagnosis in several cases. Numerous studies have previously described the potential value of immunohistochemistry ...

Molecular mechanisms involved in lactotrophs cell proliferation that led to prolactinoma development are not fully understood. Cyclin-dependant kinase (CDK) p27Kip1 is a key cell cycle regulator, and it is regulated by Menin. The transgenic mice model MEN1+/-, as the p27 -/- knock-out mice, develop pituitary adenomas and other neuroendocrine tumours. Menin can also interfere with phosphorylated AKT (pAKT) function, known for i...

Pituitary carcinomas are rare and represent a challenge in clinical practice. Most secondary tumour localizations are intracranial and spinal, followed by liver, cervical lymph node, bone and, rarely, lung. PC frequently exhibit resistance to most usual therapies and the mean survival time is usually <4 years once metastases have been identified. Ectopic ACTH Syndrome is, in up to 50% cases, caused by lung tumours including carcinoids or Small Cell Lung Carcinomas (SCLC). ...

Introduction: The deleterious effects of obesity on spontaneous reproduction are well recognized, although the literature on obesity and assisted reproductive technology outcome remains heterogeneous and inconsistent.Objective: To estimate the effect of BMI on ovarian stimulation response and live birth in women underwent in vitro fertilization (IVF).Methods: Retrospective observational study that included women submitted ...

Background: Type 2 diabetes and Hipertension are common in obese patients. Bariatric surgery is effective in sustained weight loss, but also improves glycemic and hypertension control. A high percentage of diabetes remission occurs.Methods: Retrospective study of type 2 diabetic patients submitted to bariatric surgery between 2006 and 2013 in a central hospital. Primary endpoint was evaluation of diabetes and hypertension remission, 2 years after surgery...

Background: Reduced GLUT4 expression in insulin-sensitive tissues, insulin resistance, inflammation, nonalcoholic steatohepatitis (NASH) and hypertension are pathophysiologic changes expected in metabolic syndrome animal models.Aims: To fully characterize the development and maintenance of metabolic syndrome features over time (GLUT4 in insulin-sensitive tissues, insulin resistance, inflammation, blood pressure and liver changes) in spontaneously hyperte...

Introduction: High circulating levels of some but not all unsaturated fatty acids (UFAs) can be related with reduced insulin sensitivity and glucose uptake in skeletal muscle. The real mechanisms by which UFAs impair the insulin sensitivity need to be clarified; nevertheless the UFA’s effects in the regulation of activity and/or expression of some transcriptional factors such as, nuclear factor κB (NFκB), hypoxia inducible factor-1a (HIF-1a), peroxisome prolifer...