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Endocrine and metabolic specialists or endocrinologists are doctors who specialize in the diagnosis, treatment and management of endocrine and metabolic disorders. These disorders include diseases related to hormone-secreting glands such as thyroid, high blood pressure, diabetes, obesity and imperceptible thinness, kidney failure and many others. Endocrinology and metabolism specialists diagnose diseases by using blood tests, sonography, CT scan, medical radiodiodes (for examining photographs) and other methods. They also treat some diseases by using hormonal drugs and proper diet.