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Title: Efficacy and Safety of Osilodrostat in Paraneoplastic Cushing Syndrome: A Real-World Multicenter Study in France.
Author: Dormoy A, Haissaguerre M, Vitellius G, Do Cao C, Geslot A, Drui D, Lasolle H, Vieira-Pinto O, Salenave S, François M, Puerto M, Boullay HD, Mayer A, Rod A, Laurent C, Chanson P, Reznik Y, Castinetti F, Chabre O, Baudin E, Raverot G, Tabarin A, Young J.
Journal: J Clin Endocrinol Metab; 2023 May 17; 108(6):1475-1487. PubMed ID: 36470583.
Abstract:
CONTEXT: Prospective studies have demonstrated the efficacy of osilodrostat in Cushing disease. No study has evaluated osilodrostat in a series of patients with paraneoplastic Cushing syndrome/ectopic adrenocorticotropin syndrome (PNCS/EAS). OBJECTIVE: This work aimed to evaluate in France the real-world efficacy and safety of osilodrostat in patients with PNCS/EAS. METHODS: A total of 33 patients with PNCS/EAS with intense/severe hypercortisolism were involved in this retrospective, multicenter, real-world study. Patients received osilodrostat between May 2019 and March 2022 at a median initial dose (range) of 4 mg/day (1-60) and maximum dose, 20 mg/day (4-100), first under patient then cohort temporary authorizations and after marketing authorization. Regimens used titration (n = 6), block and replace (n = 16), or titration followed by block and replace (n = 11). RESULTS: In 11 patients receiving osilodrostat as first-line monotherapy, median 24-hour urinary free cortisol (24h-UFC) decreased dramatically (from 26 × upper limit of normal [ULN; 2.9-659] to 0.11 × ULN [0.08-14.9]; P < .001). In 9 of them, 24h-UFC normalization was achieved in 2 weeks (median). Thirteen additional patients were previously treated with classic steroidogenesis inhibitors but 10 of these 13 were not controlled. In these patients, osilodrostat monotherapy, used as second line, induced a significantly decreased of 24h-UFC (from 2.6 × ULN [1.1-144] to 0.22 × ULN [0.12-0.66]; P < .01). Nine additional patients received osilodrostat in combination with another anticortisolic drug, decreasing 24h-UFC from 11.8 × ULN (0.3-247) to 0.43 × ULN (0.33-2.4) (P < .01). In parallel, major clinical symptoms/comorbidities improved dramatically with improvement in blood pressure, hyperglycemia, and hypokalemia, allowing the discontinuation or dose reduction of patient treatments. Adrenal insufficiency (grade 3-4) was reported in 8 of 33 patients. CONCLUSION: Osilodrostat is a rapidly efficient therapy for PNCS/EAS with severe/intense hypercortisolism. Osilodrostat was generally well tolerated; adrenal insufficiency was the main side effect.

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