Integration of Clinical Studies With Case Presentations
Maria Fleseriu, Richard J Auchus, Irina Bancos, Beverly MK Biller
Journal of the Endocrine Society, Volume 9, Issue 4, April 2025, bvaf027
https://doi.org/10.1210/jendso/bvaf027
Although most cases of endogenous Cushing syndrome are caused by a pituitary adenoma (Cushing disease), approximately one-third of patients present with ectopic or adrenal causes. Surgery is the first-line treatment for most patients with Cushing syndrome; however, medical therapy is an important management option for those who are not eligible for, refuse, or do not respond to surgery. Clinical experience demonstrating that osilodrostat, an oral 11β-hydroxylase inhibitor, is effective and well tolerated comes predominantly from phase III trials in patients with Cushing disease. Nonetheless, reports of its use in patients with ectopic or adrenal Cushing syndrome are increasing. These data highlight the importance of selecting the most appropriate starting dose and titration frequency while monitoring for adverse events, including those related to hypocortisolism and prolongation of the QT interval, to optimize treatment outcomes. Here we use illustrative case studies to discuss practical considerations for the management of patients with ectopic or adrenal Cushing syndrome and review published data on the use of osilodrostat in these patients. The case studies show that to achieve the goal of reducing cortisol levels in all etiologies of Cushing syndrome, management should be individualized according to each patient’s disease severity, comorbidities, performance status, and response to treatment. This approach to osilodrostat treatment maximizes the benefits of effective cortisol control, leads to improvements in comorbid conditions, and may ameliorate quality of life for patients across all types and severities of Cushing syndrome.
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