CRH Stimulation Pituitary vs Ectopic ACTH Localization

Use CRH stimulation test to differentiate pituitary from ectopic ACTH source. Pituitary: ACTH rises >35%; ectopic: minimal or no response.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Use CRH stimulation test to differentiate pituitary from ectopic ACTH source. Pituitary: ACTH rises >35%; ectopic: minimal or no response

Each component has a specific meaning:

  • Ectopic ACTH source — The ectopic acth source recorded for the scenario being assessed.

Note: Interpret the crh stimulation result against the thresholds and context described above.

How to Use

Enter the ectopic ACTH source for the scenario you are assessing. Use CRH stimulation test to differentiate pituitary from ectopic ACTH source. Pituitary: ACTH rises >35%; ectopic: minimal or no response. Use the crh stimulation result to inform your calculation.

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Frequently Asked Questions