FRI225 Clinical Course Of Late-onset Adrenal Insufficiency Due To Treatment Of Childhood Acute Lymphoblastic Leukemia

Disclosure: M. Iwabuchi: None. Background: Some people who were treated for cancer during childhood may develop endocrine problems as because of changes in the function of endocrine system. Acute lymphoblastic leukemia is the most common type of cancer and leukemia in children and components of ALL treatment are induction, consolidation, maintenance, and central nervous system prophylaxis. It is recommended that people who had irradiation in a dose of 40 Gy or higher to the central area of the hypothalamic-pituitary axis should have a blood test done to check the cortisol level and should be done yearly for at least 15 years since this complication can occur many years after irradiation. Clinical Case: A man in his 40s was admitted with symptoms of diarrhea, low-grade fever, and drowsiness. The serum sodium level that caused his symptoms decreased to 100 mEq/L and was adequately corrected. Endocrinological examination confirmed the diagnosis of central adrenal insufficiency. Soon after starting hormonal replacement therapy with hydrocortisone, his general conditions improved. After establishing our relationship, he confessed to having a history of ALL in childhood. According to his medical records at the time, he underwent induction therapy with vincristine-prednisone in 1977, maintenance therapy with 6-mercaptopurine, and radiation therapy to the central nervous system of 25 Gy in 1983. In 2023, 40 years have passed since radiation therapy. He was able to lead a normal life on oral hydrocortisone 20 mg/day without recurrence of adrenal insufficiency. Clinical Lesson: A 40-old male survivor of ALL developed adrenal insufficiency in 30 years after cranial irradiation during childhood. Undiagnosed adrenal insufficiency is often the cause of death. We should consider childhood cancer survivors have the risk of a central adrenal insufficiency. The Children’s Oncology Group Long-Term Follow-Up Guidelines for Survivors of Childhood, Adolescent, and Young Adult Cancers (COG LTFU Guidelines) are a resource for healthcare professionals who provide ongoing care to survivors of pediatric malignancies. The screening recommendations in these guidelines are appropriate for asymptomatic survivors of childhood, adolescent, or young adult cancer presenting for routine exposure-based medical follow-up. It is recommended that people who had irradiation in a dose of 40 Gy or higher to the central area of the hypothalamic-pituitary axis should have a blood test done to check the cortisol level and should be done yearly for at least 15 years since this complication can occur many years after irradiation. This case highlights the importance of long-term follow-up of cancer survivors after irradiation and the delayed presentation of adrenal insufficiency. This is the first report of the subsequent treatment course of late-onset adrenal insufficiency that developed 30 years after irradiation for childhood central nervous system ALL. Presentation: Friday, June 16, 2023