CPT® Code 84138

Pregnanetriol is a specific steroid metabolite derived from 17-hydroxyprogesterone, which plays a crucial role in the body's hormonal balance. This compound is primarily excreted in urine, making it a valuable marker for assessing certain endocrine disorders. Pregnanetriol serves as a precursor in the biosynthesis of cortisol, a vital hormone involved in various physiological processes, including metabolism and stress response. Elevated levels of pregnanetriol in the urine can indicate underlying conditions related to the adrenal cortex, such as adrenal hyperplasia, a condition characterized by the overproduction of adrenal hormones, or adrenogenital syndrome, which affects hormone levels and can lead to abnormal sexual development. The measurement of pregnanetriol is typically conducted through a 24-hour urine collection, where a sample volume of 2.1 to 5 mL is analyzed using advanced techniques like gas chromatography mass spectrophotometry. This method allows for precise quantification of pregnanetriol, aiding in the diagnosis and management of adrenal disorders.