Measuring cortisol in Cushing syndrome: diagnosis, monitoring, and cortisol circadian rhythm improvement

Mar 14, 2026The Journal of clinical endocrinology and metabolism

Measuring cortisol in Cushing syndrome for diagnosis, monitoring, and improving daily cortisol patterns

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Abstract

Endogenous Cushing syndrome (CS) is characterized by excessive daily cortisol production and disrupted circadian rhythm of cortisol secretion.

  • CS symptoms are often non-specific, leading to potential underdiagnosis.
  • Biochemical testing for CS can be complex, particularly in milder cases.
  • Current cortisol monitoring methods may not effectively capture daily fluctuations in cortisol levels.
  • The role of assessing cortisol circadian rhythm in diagnosing and treating CS is not well understood.

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