This book will present readers with a general as well as an advanced overview of the essential trends in endocrine disorders. Apart from covering a variety of topics including thyroid carcinogenesis and pituitary adenomas, this book also discusses more specific issues which have not yet been fully elucidated. These include molecular pathways involved in thyrotropin beta gene regulation or monogenic phosphate balance disorders. This book will provide an opportunity to readers from distinct backgrounds to attain knowledge and clarify areas of uncertainty and controversies in several topics of endocrine disorders.