AB0353 ADRENAL INSUFFICIENCY AFTER GLUCOCORTICOID TREATMENT OF GIANT CELL ARTERITIS

Background:Adrenal insufficiency is frequently neglected and underappreciated, potentially severe complication of systemic glucocorticoid therapy.Objectives:We aimed to evaluate the prevalence of glucocorticoid induced adrenal insufficiency in giant cell arteritis (GCA).Methods:We analysed adrenal function data in a cohort of GCA patients diagnosed between July 2014 and July 2019, in whom discontinuation of methylprednisolone therapy was planned. Adrenal function was tested by Corticotropin stimulation test (CST). To perform the CST, methylprednisolone was substituted with hydrocortisone (20mg qd in three divided doses) for one to four weeks before the test. Adrenal insufficiency was defined as cortisol level <450 nmol/l measured 30 minutes after the corticotropin injection; additionally, the result of the CST was defined as borderline when the cortisol level 30 minutes after corticotropin injection was between 450 nmol/l and 500 nmol/l.Results:Adrenal function was tested in 74/215 GCA patients before definite methylprednisolone withdrawal (after a median 13.5 (12.9 – 22.4) months of glucocorticoid therapy). The mean (SD) methylprednisolone dose, prior to substitution with hydrocortisone and subsequent CST, was 3.1 (1.6) mg. Adrenal insufficiency was detected in 36/74 patients (48.6%); additionally, 10/74 patients (13.5%) had a borderline CST result. Seventeen patients with either adrenal insufficiency or borderline CST result, had a repeated CST after median (IQR) 11.6 (8.9; 12.6) months. Adrenal insufficiency persisted in 11/17 (64.7%) patients, and 1/17 patients had a borderline CST. A third CST was performed in 4/12 patients with abnormal second CST after median (IQR) 8.3 (6.9; 10.6) months. Adrenal function recovered in one patient, while the adrenal insufficiency persisted in the remaining 3 patients.Conclusion:Adrenal insufficiency is a common and potentially long-lasting glucocorticoid induced adverse event in GCA patients.Disclosure of Interests:None declared

The Prevalence of Tertiary Adrenal Insufficiency in Patients Receiving Topical Glucocorticoid Treatment for Oral Lichen Planus

Objective: Glucocorticoid (GC) treatment suppress the hypothalamic-pituitary-adrenal axis, which may lead to tertiary adrenal insufficiency. This study aimed to investigate the prevalence of tertiary adrenal insufficiency among patients with oral lichen planus treated with topical GC (clobetasol propionate) in the oral cavity, a standard treatment option for this condition. Methods: In this cross-sectional study, we included 24 patients with oral lichen planus receiving long-term (&gt; 6 weeks) clobetasol propionate treatment. Adrenal function was assessed by measuring serum cortisol between 8–9 AM, after a withdrawal of treatment for 48 hours. For patients with serum cortisol concentrations below 280 nmol/L (10 µg/dL), a 250 µg corticotropin stimulation test was performed. Results: Twenty patients had normal serum cortisol concentrations (range 280–621 nmol/L), whereas four patients had low serum cortisol concentrations (13, 45, 63, and 229 nmol/L, respectively). A corticotropin stimulation test revealed partial adrenal insufficiency in two patients (serum cortisol peak level 350 nmol/L and 360 nmol/L) and severe adrenal insufficiency in another two patients (serum cortisol peak level 150 nmol/L and 210 nmol/L). Conclusion: In this small study, approximately 20% of patients receiving chronic topical GCs treatment for oral lichen planus had tertiary adrenal insufficiency. It is essential to be aware of this potential risk and to inform patients about the need for GC stress-doses during an intercurrent illness episode.