Zorana Penezić

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OBJECTIVE The goal of our study was to determine the rate of neoplasms in patients with other pituitary adenomas (non-functioning and prolactinomas) in comparison with acromegaly which is known to favour the development of neoplasia. DESIGN AND PATIENTS We reviewed clinical records for 220 patients with acromegaly, 151 patients with non-functioning(More)
The aim of the study was to assess whether pulsatile insulin secretion is variable in the same individual and is related to changes in insulin sensitivity. Insulin sensitivity and pulsatility were measured before and after weight reduction in nine obese subjects. A pulsatility analysis was done using the PulsDetekt program. Blood was sampled every 2 min(More)
ACTH stimulation is the standard test for assessment of adrenal function. It was suggested that the low dose (1 microg) would be more sensitive for detecting mild secondary adrenal insufficiency than the usual dose of 250 microg. The aim of this study was to find the optimal diagnostic criteria and to compare standard dose test (SDT) with the low dose test(More)
OBJECTIVE Response to acute psychological stress is characterized by activation of the hypothalamic-pituitary-adrenal (HPA) axis and the sympathetic nervous system. However, response to the prolonged psychological stress is less well known. DESIGN This study was designed as a prospective assessment of cortisol secretion during prolonged psychological(More)
It is well known that glucocorticoids induce insulin resistance, but the exact time scale in humans is not well known. The aim of the study was to determine the time scale of effects of pharmacologic doses of glucocorticoids on insulin sensitivity. Subjects were treated with repeated methylprednisolone infusions and oral prednisone for Graves' orbitopathy.(More)
INTRODUCTION Endogenous Cushing's syndrome is a clinical state resulting from prolonged, inappropriate exposure to excessive endogenous secretion of cortisol and hence excess circulating free cortisol, characterized by loss of the normal feedback mechanisms of the hypothalamo-pituitary-adrenal axis and the normal circadian rhythm of cortisol secretion [2].(More)
OBJECTIVE The aim of the study was to determine whether derangements in insulin pulsatility are related to the presence of insulin resistance or whether these changes occur only in non-insulin-dependent diabetes mellitus (NIDDM). DESIGN AND METHODS The study included 26 obese, 11 NIDDM and 10 control subjects. The obese group was divided into a low(More)
OBJECTIVE To evaluate the influence of three-week fasting on gonadotropin pulsatility in extremely obese women of reproductive age. DESIGN Prospective study of 21-day fasting (400 kcal/day), under medical supervision. SUBJECTS 20 females, average age of 35.1 +/- 5.9 y, and average BMI of 41.19 +/- 8.39 kg/m2, with regular menstrual cycles (26-34 days).(More)
Many of the presenting features in women with Cushing's syndrome (CS) are similar to those observed for patients with polycystic ovary syndrome (PCOS). The aim of this study was to compare gonadotropin pulsatility characteristics in CS and PCOS. We evaluated 32 females divided into three groups. The first group comprised 12 females with clinically and(More)
The aim of this study was to assess the luteinizing hormone (LH) and follicle stimulating hormone (FSH) pulsatile secretion and their temporal relation (concordance) in subjects with polycystic ovary syndrome (PCOS). Fifteen subjects were included in the study (age 17-30 years, body mass index (BMI) 19.38-33.46 kg/m2). For the LH and FSH determinations,(More)