7726 Central Adrenal Insufficiency From Inhaled Mometasone Manifesting As Growth Deceleration

Abstract Disclosure: S. Gurnurkar: None. F.I. Cooper: None. Introduction: While long courses and/or high-doses of oral steroids have been found to cause adrenal suppression and resultant insufficiency, inhaled corticosteroids from asthma management typically do not affect cortisol production. However, in this case, we describe a patient who presented with 3 years of growth deceleration and was found to have adrenal suppression from her inhaled corticosteroid/long-acting beta agonist, Dulera (mometasone furoate and formoterol fumarate). Case Presentation: An 11-year-old female with history of moderate persistent asthma presented to our endocrinology department with growth deceleration and resultant short stature. The parent noted that the child started to decelerate in height percentiles from the 50th percentile at age 8 to the 6th percentile at age 11. BMI gradually rose from the 85th to 95th percentiles. The parent noted that the child started having worsening asthma symptoms around the start of the growth deceleration, requiring a handful of oral steroid courses and the addition of daily inhaled corticosteroid, Dulera. She had remained on the Dulera for the previous three years, with her asthma under good control. She also took cetirizine daily and albuterol as needed. The last course of oral steroids was three months prior to her first endocrinology visit. The patient’s mid-parental target height was at the 50th percentile and she denied fatigue, headache, or abdominal pain. Family history was negative for endocrine conditions and short stature. Puberty began at age 10. Further workup was recommended. A bone age was concordant with chronologic age. Initial labs including a TSH, free T4, IGF-1, IGFBP-3, CBC, ESR, and CMP were within normal limits. A growth hormone stimulation test with arginine and clonidine was performed. Growth hormone peak was 11 ng/mL, but, interestingly, cortisol resulted as <1.0 ug/dl throughout the test. Due to concerns of adrenal insufficiency, she underwent a high dose ACTH stimulation test. Initial ACTH was 6.3 pg/mL (ref 6-48 pg/mL) and cortisol remained at <1.0 ug/dl at 0, 30, and 60 mins. She was diagnosed with central adrenal insufficiency and prescribed 11 mg/m2 BSA/day of hydrocortisone divided three times daily, with stress dosing and emergency hydrocortisone injection instructions. Conclusion: The existing literature suggests that Dulera (mometasone furoate and formoterol fumarate) does not significantly influence adrenal function nor growth velocity. However, we present the case of a child with 3 years of inhaled Dulera use and significant central adrenal insufficiency. This case report is the first of its kind to detail decreased adrenal function with Dulera in particular. Presentation: 6/2/2024