FRI254 Unconventional Pre-operative Management Of Congenital Adrenal Hyperplasia

Disclosure: M.A. Ortiz-Rivera: None. L.N. Madera Marin: None. A. Rosado-Burgos: None. L. El Musa Penna: None. W. Medina-Torres: None. L.R. Sepulveda-Garcia: None. L.A. Gonzalez-Rodriguez: None. M. Ramirez-Vick: None. M. Alvarado-Santiago: None. A.J. Grana Santini: None. M. Feliciano-Emmanuelli: None. Management of classic salt-wasting congenital adrenal hyperplasia [CAH] warrants suppression of the hypothalamic-pituitary-adrenal axis through glucocorticoid and mineralocorticoid supplementation. Preferred glucocorticoid replacement is generally hydrocortisone [HC] 3 times daily but caring for these patients often involves unconventional choices of glucocorticoid preparation regimens tailored to meet patient needs. A 41-year-old female with history of long-standing poorly controlled classic salt-wasting CAH associated to secondary amenorrhea and hypothyroidism, presenting with bilateral myelolipomas was consulted to our service for pre-op optimization. She underwent evaluation by Urology due to worsening right-sided back pain for which an abdominal-pelvic CT was performed showing large bilateral adrenal gland lesions (left mass measuring 11.5 x 10.3 x 10.6 cm and right mass measuring 8.1 x 10.4 x 7.7 cm) consistent with adrenal myelolipomas. Endocrine surgeon favored adrenalectomy due to mass effect brought about by massive adrenal growth secondary to inadequate therapeutic regime. Patient had been lost to follow-up after transitioning from pediatric to adult Endocrinology and was managed by her primary care physician who kept her on an unmodified therapeutic regime. During a pharmacy shortage of HC, she was switched from HC 25 mg TID to 5 mg daily. Furthermore, use of fludrocortisone 0.1 mg daily had been inadvertently halted in the past year. There had been progressive skin hyperpigmentation since the age of 20, significant hirsutism and salt cravings which made her add soy sauce to meals. At the age of 12 a vaginoplasty was performed, with menstrual periods ceasing at age 15. Physical examination was remarkable for grave voice, broad shoulders, bronze skin and coarse terminal hairs on chin, upper lip, sides of face and upper back. Hormonal workup revealed a direct renin > 300 pg/mL (nl 3.6 – 81.6), ACTH 463 pg/mL (nl 0.00 – 46.00), androstenedione > 10 ng/mL (nl 0.6 – 3.10), total testosterone [TT] 419 ng/dL (nl 13 – 53) and 17-hydroxyprogesterone [17-OHprog] > 20 ng/mL (nl 0.20 – 2.6). Frequent increases in medication dosing, up to HC 20mg TID and fludrocortisone 0.1mcg BID, did not attain adequate hormonal control. Dexamethasone 0.25 mg was then added at bedtime and the patient was finally able to achieve restoration of menses, resolution of salt cravings and hormonal profile control with decreases in renin to 23.02 pg/mL, androstenedione to < 0.30 ng/mL, TT to 11 ng/dL and 17-OHprog to 3.15 ng/mL. Alternative treatment strategies are sometimes warranted to achieve control of CAH. In this patient with prominent androgen excess and amenorrhea who failed to meet goals on high doses of hydrocortisone and fludrocortisone, combination therapy with a small dose of long-acting glucocorticoid at bedtime achieved the desired goal. Presentation: Friday, June 16, 2023