Endocrine Abstracts

Introduction: Insulinomas are pancreatic endocrine tumors originating in the beta cells, characterized by hypoglycemia resulting from insulin hypersecretion.Objectives: To characterize the demography, the clinical features, imagiological findings and pathological evaluation of the cases of insulinomas identified in the previous 35 years at São João Hospital.Methods: We retrospectively analyzed the cases diagnosed as insul...

Coupling the release of pituitary hormones to the developmental stage of the oocyte is essential for female fertility. It requires estrogen to have simultaneous positive and negative feedback effects on spatially-distinct regions of the hypothalamus. However, the mechanistic basis for this differential effect is not known. We have found that negative-feedback is mediated by the nuclear receptor Dax1, which is present in the arcuate hypothalamic nucleus and serves as a ligand-d...

Nutrient sensors mediating the stimulatory effects of food-derived carbohydrates and lipids on incretin and insulin secretion have been widely studied. However, mechanisms underlying amino acid regulation of those processes remain poorly understood. GPR142 was recently reported to be highly expressed in pancreatic beta cells and selectively activated by L-Tryptophan (L-Trp). Moreover, synthetic GPR142 agonists were demonstrated to stimulate glucose-dependent insulin secretion ...

Introduction: Cushing’s disease (CD) is a rare disorder caused by an ACTH-secreting pituitary adenoma. Transsphenoidal surgery (TSS) is the recommended first-line treatment. However, an equivocal or even normal preoperative MRI can preclude the surgical management and the outcome of these patients.Objectives: Evaluate the relationship between preoperative MRI and TSS efficacy in patients with CD.Methods: Retrospective cohort s...

Objective: Evaluate the efficacy and safety of adding lixisenatide to uncontrolled type 2 diabetic (T2DM) patients treated with insulin.Methods: A prospective uncontrolled study was designed. Primary endpoints (measured at 3 and 6 months) were change in HbA1c, weight, and insulin doses. Variables analysed were: HbA1c level, insulin and other hypoglycaemic agents doses, capillary glucose tests, number and type of hypoglycaemias, side effects and body comp...

Introduction: Treatment satisfaction is simultaneously a cause and consequence of the success of bariatric surgery – not only it is a reflection of the efficacy of treatment, it also enhances weight loss. A questionnaire that evaluates this variable has recently been created and validated by the authors (Post-Bariatric Surgery Satisfaction Questionnaire).Objectives: To identify patients’ expectations regarding bariatric surgery; to identify the...

Introduction: Post-bariatric surgery satisfaction relies on psychosocial and clinical factors. A questionnaire that evaluates this variable has recently been created and validated by the authors (Post-Bariatric Surgery Satisfaction Questionnaire).Objective: To assess the relationship between treatment satisfaction and several demographic and clinical variables.Methods: Patients submitted to bariatric surgery who presented to our Ob...

Objective: To evaluate the prevalence of thyroid cancer in patients with suspected thyroid nodule referred from primary care.Methods: Retrospective cohort study which included patients with suspected thyroid nodule referred from primary care to a high-resolution thyroid nodule clinic. Demographic and clinical characteristics were collected, all patients underwent thyroid ultrasound and subsequently, a fine-needle aspiration (FNA) was performed if thyroid...

Objectives: To evaluate the efficacy, safety and patient’s pain perception of percutaneous ethanol injection treatment (PEIT) as an alternative to surgery in symptomatic thyroid cysts.Patients and methods: Thirty consecutive patients (mean age: 46±10 years; 82% women) with symptomatic thyroid cysts relapsed after drainage were included. In all cases, cytology prior to treatment, maximum cyst diameter and volume were determined. PEIT was conduct...

Diabetes insipidus is a disease characterized by the inability to concentrate urine. The common form is central diabetes insipidus (CDI) caused by a lack of AVP after destruction of supraoptic–paraventricular nuclei. Further investigations are needed to establish its cause.: Case reportA 38-year-old woman presented with prompt polyuria–polydipsia. She has been taking contraceptive tablets for 2 years, smoked four to five cigarettes per day....