Acquired idiopathic isolated ACTH deficiency with associated autoimmune thyroiditis in pediatrics: case report and review of the literature

Abstract Objectives Isolated ACTH deficiency (IAD) is defined as an impaired secretion of ACTH from the pituitary gland without any other anterior pituitary hormonal deficits. The idiopathic form of IAD has been described mainly in adults and is thought to be caused by an autoimmune mechanism. Case presentation Herein, we present an 11-year-old _prepubertal previously healthy boy, who suffered a severe hypoglycemic episode short after the initiation of thyroxine for autoimmune thyroiditis and was finally diagnosed with secondary adrenal failure due to idiopathic IAD, after all other etiologies were excluded, thought an extensive diagnostic work-up. Conclusions Idiopathic IAD is a rare entity of adrenal insufficiency in pediatrics that should be considered as an etiology of secondary adrenal failure in children, when clinical signs of glucocorticoid deficiency are present and other causes are excluded.