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Why can urinary steroid measurements help detect endocrine abnormalities?
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Steroid
Many important physiological functions of vertebrates are controlled by steroid hormones.
Urinary steroid measurements are valuable for detecting endocrine abnormalities because the body metabolizes active steroid hormones into physiologically inactive products, which are then excreted primarily in the urine.1
Because these excreted metabolites reflect the original hormone secretion patterns, analyzing them allows clinicians to assess the function of specific endocrine glands. For example:1
- Adrenal Function: Urinary 17-ketosteroids are derived from the oxidation of adrenal hormones in the liver. Measuring these levels helps gauge the secretory activity of the adrenal gland.1
- Reproductive Health: During pregnancy, the excretion of pregnanediol—a metabolite of progesterone—is used to measure placental output.1
In cases of genetic defects or tumours affecting endocrine glands, the body's characteristic hormone patterns become distorted. By identifying these deviations through urinalysis, medical professionals can diagnose underlying disorders and monitor clinical conditions.12