Lab

Free Urine Cortisol

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Free Urine Cortisol, 24-hour Urinary free cortisol level, 24 hour Urine Cortisol, Urine 17-Ketosteroid excretion, Urine 17-Hydroxysteroid excretion

  • Indication
  1. Screening for Cushing's Disease
  • Interpretation
  • Normal
  1. Free Urine Cortisol: 10-84 mcg/24 hours (up to 110 mcg/24 hours in some reference ranges)
  • Interpretation
  • Increased (especially if 4x normal range)
  1. See Serum Cortisol
  2. Cushing's Disease
  3. ACTH-Secreting Pituitary Adenoma
  4. Estrogen
  • Precautions
  1. Depends on complete and accurate urine collection