Abstract

Abstract Disclosure: C. Iweha: None. E.K. Babler: None. M. Castillo: None. Introduction Cushing Disease (CD) is an endocrine disorder that predominantly affects women of childbearing age and is characterized by excess secretion of adrenocorticotropic hormone (ACTH) with hypercortisolism. We report a case of a woman with ACTH-dependent hypercortisolism treated with pasireotide who had a successful pregnancy while on treatment. Clinical Case A 27-year-old woman presented to the initial consult on 9/01/2011 with a 4-year history of ongoing symptoms of hirsutism, diaphoresis, oligomenorrhea, myalgia, and acne. A physical exam revealed an overweight female with mild facial acne and hirsutism. Family history included autoimmune disease in mother (lupus and multiple sclerosis). She was frustrated by the lack of a definitive diagnosis over 4 years; she was anxious and using multiple medications, including anxiolytics and analgesics, without relief of symptoms. Patient did not use alcohol and never smoked. Labs revealed initial morning (AM) cortisol = 26.9 µg/dL (normal range: 5-23 µg/dL) and ACTH = 14 pg/mL (normal: 6-58 pg/mL); 24-hour urinary cortisol was 110.6 µg/24 h (normal:<100 µg/dL) and serum ACTH =8 pg/mL. Low-dose (1 mg) dexamethasone suppression test reduced AM cortisol to 1.7 µg/dL and ACTH of 8 pg/mL. No evidence of adrenal adenoma on abdominal CT or pituitary adenoma on brain MRI, and IPSS confirmed diagnosis. Based on hypercortisolism and normal ACTH level, diagnosis was ACTH-dependent CD. We advised the patient to join a clinical trial for pasireotide, and she began treatment on 1/3/2013. She presented for follow-up on 6/17/2014 and reported improvement of some symptoms on 0.6 mg pasireotide twice daily, the highest dose she could tolerate. She reported experiencing chronic pain; medications included prescription analgesics, muscle relaxants, and anxiolytics. On 6/23/2015, our patient returned for a follow-up when she was 5.5 months pregnant. While on pasireotide, she became pregnant and subsequently left the study and discontinued treatment. She reported recurrence of hirsutism, acne, fatigue, and hyperemesis with discontinuation of pasireotide. Patient returned twice more during pregnancy and had a successful delivery and healthy infant. Clinical Conclusions Successful conception and pregnancy are unusual with CD due to fertility-inhibiting hormonal effects of excess cortisol. Some medications for CD impede pregnancy through their mechanism (eg, mifepristone). Our patient conceiving while on treatment is promising for women with CD. Although her CD symptoms returned when pasireotide was discontinued, she delivered a healthy infant; limited pasireotide data in pregnant women are insufficient to inform a drug-associated risk for major birth defects and miscarriage. Our case underscores the potential for successful conception for women with CD when cortisol levels are normalized with treatment that avoids suppressing menstruation. Presentation: Thursday, June 15, 2023

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