Spectrum of Adrenal Dysfunction in Hemoglobin E/Beta Thalassemia

Area of Science:

• Endocrinology
• Hematology
• Internal Medicine

Background:

• Adrenal insufficiency (AI) evaluation, including the mineralocorticoid axis, was previously unstudied in hemoglobin E (HbE)/beta thalassemia.
• This study addresses a gap in understanding AI prevalence within this specific patient population.

Purpose of the Study:

• To determine the prevalence of AI in patients with HbE/beta thalassemia.
• To investigate if AI prevalence correlates with disease severity or transfusion requirements in HbE/beta thalassemia.

Main Methods:

• An observational, cross-sectional study involved 104 patients with HbE/beta thalassemia.
• Evaluated early morning serum cortisol, plasma ACTH, and plasma aldosterone/renin levels.
• Utilized the 1 μg and 250 μg short Synacthen test for patients with baseline cortisol between 5-18 μg/dL to classify adrenal function.

Main Results:

• Adrenal insufficiency (AI) was detected in 41% of patients (n=43), with 83.7% being primary AI and 16.3% secondary AI.
• Subclinical AI was diagnosed in 31% of patients (n=33) based on specific hormonal criteria.
• No significant difference in AI prevalence was observed based on transfusion dependency (P=.56) or disease severity (P=.52).

Conclusions:

• Adrenal insufficiency is a frequent complication in HbE/beta thalassemia.
• The occurrence of AI in this condition is independent of transfusion dependency and disease severity.