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Young animals respond to threatening stimuli in an age-specific way. Their endocrine and behavioral responses reflect the potential threat of the situation at a given age. The aim of the present study was to determine whether corticotropin-releasing factor (CRF) is involved in the endocrine and behavioral responses to threat and their developmental changes in young rats. Preweaning 14-day-old and postweaning 26-day-old rats were exposed to two age-specific threats, cat odor and an adult male rat. The acute behavioral response was determined during exposure. After exposure, the time courses of the corticosterone response and of CRF expression in the paraventricular nucleus of the hypothalamus (PVN) and in extrahypothalamic areas were assessed. Preweaning rats became immobile when exposed to cat odor or the male rat, whereas postweaning rats became immobile to cat odor only. Male exposure increased serum corticosterone levels in 14-day-old rats, but cat odor failed to increase levels at either age. Exposure induced elevation of CRF mRNA levels in the PVN that paralleled changes in corticosterone levels. CRF may thus play a role in endocrine regulation and its developmental changes during early life. Neither cat odor nor the adult male altered CRF mRNA levels in the bed nucleus of the stria terminalis (BNST) or the amygdala, but both stimuli increased levels in the hippocampus. Hippocampal CRF mRNA expression levels did not parallel cat odor or male-induced immobility, indicating that CRF is not involved in this response in young rats but may be involved in aspects of learning and memory. (C) 2004 Elsevier Inc. All rights reserved

Adult. --- Age. --- Amygdala. --- Animal. --- Animals. --- Area. --- Bed nucleus. --- Behavioral-responses. --- Cat odor. --- Cat. --- Corticosterone. --- Corticotropin-releasing factor. --- Corticotropin-releasing hormone. --- Corticotropin-releasing-factor. --- Crf. --- Defensive-withdrawal. --- Dentate gyrus. --- Developmental-changes. --- Endocrine. --- Exposure. --- Expression. --- Fear. --- Gene-expression. --- Glucocorticoid. --- Hippocampal. --- Hippocampus. --- Hpa axis. --- Hypothalamus. --- Immature rat. --- Immobility. --- Immobilization stress. --- Increase. --- Learning. --- Level. --- Life. --- Male rat. --- Male. --- Memory. --- Messenger-rna expression. --- Nucleus. --- Odor. --- Paraventricular nucleus. --- Pituitary-adrenal axis. --- Play. --- Predation. --- Rat. --- Rats. --- Regulation. --- Response. --- Responses. --- Serum. --- Stimuli. --- Stria terminalis. --- Time-course. --- Time. --- Ultrasonic vocalization. --- Young-rats. --- Young.

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Thyroid nodular disease is one of the most frequent endocrine diseases. The prevalence of thyroid focal lesions detected by imaging techniques, according to studies on different populations, ranges from 10 to 70%. In a population of women over 50 years of age, approximately half of them will have a thyroid focal lesion. However, only 18% of thyroid nodules are diagnosed as malignant. Thyroid nodular disease is the most frequently diagnosed endocrine pathology, while thyroid cancer constitues the most common endocrine malignancy and is reponsible for about 67% of deaths due to neoplasms derived from endocrine organs. The incidence of thyroid cancer has risen by about 240% in the last three decades. Due to the increased availability of imaging techniques, recently, a rise in the detectability of thyroid cancer at the stage of microcarcinoma has been observed. Diagnostic and therapeutic decisions in patients with thyroid nodules require an interdisciplinary consensus between endocrinologists and physicians of other specialities (radiologists, pathologists, surgeons, oncologists). This book focuses on current trends in novel techniques of thyroid nodule diagnostics before they are implemented in the current guidelines on the management of thyroid nodular disease.

thyroid nodule --- care pathway --- guidelines --- fine-needle aspiration cytology --- thyroid cancer --- COLD-PCR --- digital PCR --- BRAFV600E --- papillary thyroid cancer --- liquid biopsy --- thyroid nodules --- ultrasound --- computer-aided diagnosis --- S-Detect --- EU-TIRADS --- PTC --- thyroid --- metastasis --- Snail-1 --- primary hyperparathyroidism --- parathyroidectomy --- remedial surgery --- ectopic mediastinal localization --- persistent hypercalcemia --- ectopic thymus --- shear wave sonoelastography --- strain elastography --- metastatic lymph nodes --- shear wave elastography --- interobserver variability --- tissue aspirate parathyroid hormone assay --- recurrent renal hyperparathyroidism --- persistent renal hyperparathyroidism --- parathyroid sonography --- parathyroid scintigraphy --- thyroid surgery --- vocal cord dysfunction --- vocal cord palsy --- loss of signal --- complications --- parathyroid adenoma --- hyperparathyroidism --- PET-CT --- FEC --- FCH --- n/a --- postsurgical hypoparathyroidism --- risk-factor analysis --- time course