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Triphasic Adrenocorticotropic Hormone Dynamics During Immune Checkpoint Inhibitor Therapy in a Patient With Malignant
Natsumi Kuwata1, Natsuko Ohashi1, Maya Yonishi-Nakamura1,2
1Department of Diabetes, Endocrinology and Nephrology, Shiga University of Medical Science, Otsu, Shiga, Japan.
AACE Endocrinology and Diabetes
|July 23, 2026
Summary
Immune checkpoint inhibitor (ICI) therapy can cause a rare triphasic adrenocorticotropic hormone (ACTH) pattern, initially showing deficiency, then transient elevation, before permanent adrenal insufficiency. This highlights the need for careful monitoring in patients receiving ICI treatment.
Area of Science:
- Endocrinology
- Immunology
- Oncology
Background:
- Immune checkpoint inhibitors (ICIs) are used to treat various cancers.
- ICI-related hypophysitis commonly leads to irreversible adrenocorticotropic hormone (ACTH) deficiency.
- Recent findings suggest transient ACTH elevation may precede adrenal insufficiency.
