TY - JOUR
T1 - Mitotane dosage, plasma levels, and anthropometric measurements in pediatric adrenocortical carcinoma
AU - Riedmeier, Maria
AU - Frey, Heidi
AU - Antonini, Sonir R
AU - Canali, Gabriela Fernandes Luiz
AU - Classen, Carl Friedrich
AU - Domínguez-Pinilla, Nerea
AU - Fassnacht, Martin
AU - Finger, Jasmin
AU - Fuchs, Steffen
AU - Grönroos, Marika
AU - Halah, Mariana P
AU - Härtel, Christoph
AU - Janus, Dominika
AU - Jaspers-Bakker, Antoinette
AU - de Krijger, Ronald R
AU - Kutluk, Tezer
AU - Mezoued, Mouna
AU - Munarin, Jessica
AU - van Noesel, Max
AU - Köse, Nihal Özdemir
AU - Pearce, Simon H
AU - Perwein, Thomas
AU - Puglisi, Soraya
AU - Schlegel, Paul-Gerhardt
AU - Binder-Blaser, Vera
AU - Tuli, Gerdi
AU - Walenciak, Justyna
AU - Yalcin, Bilgehan
AU - Wiegering, Verena
N1 - Publisher Copyright:
© 2026 the author(s).
PY - 2026/1
Y1 - 2026/1
N2 - OBJECTIVE: Mitotane is an effective treatment for advanced adrenocortical carcinoma (ACC). Given the limited pediatric data available, this study aims to evaluate the associations between mitotane dosage, plasma drug levels, and anthropometric measurements, as well as their potential impact on dosage requirements to optimize therapeutic outcomes in pediatric patients with ACC (pACC).DESIGN AND METHODS: A retrospective, international, multicenter study was conducted on pediatric ACC patients treated with mitotane across 18 centers. Mitotane serum levels were obtained from the Lysosafe Online® database or directly from the centers. Data from the cohort with plasma levels within the target range (≥14 mg/L; n = 319) were analyzed and compared to those with levels outside this range (n = 320).RESULTS: Fifty pediatric patients (60% female) diagnosed between 2004 and 2023 were included, with a median follow-up of 34.5 months and a 10-year overall survival of 33 months. The median age at diagnosis was 8.6 years, with most tumors (84%) hormone-secreting. Among 49 patients undergoing surgery, 31 (62%) achieved R0 resection. The median treatment duration was 18 months, with a median mitotane dose of 87 mg/kg/day in patients within the target plasma level range, showing no significant difference from those outside the range. However, BMI was significantly associated with doses of plasma levels in target range (P = 0.001), as underweight (105.4 mg/kg/day) and healthy weight patients (98.4 mg/kg/day) required higher doses than overweight/obese patients (44.4 mg/kg/day). No significant differences in daily dose levels (mg/kg/day and mg/m2/day) were observed based on body weight.CONCLUSION: This study supports estimating mitotane dosages in pediatric ACC, emphasizing the need for close monitoring and frequent follow-ups at specialized centers due to individualized dosing and a narrow therapeutic window.
AB - OBJECTIVE: Mitotane is an effective treatment for advanced adrenocortical carcinoma (ACC). Given the limited pediatric data available, this study aims to evaluate the associations between mitotane dosage, plasma drug levels, and anthropometric measurements, as well as their potential impact on dosage requirements to optimize therapeutic outcomes in pediatric patients with ACC (pACC).DESIGN AND METHODS: A retrospective, international, multicenter study was conducted on pediatric ACC patients treated with mitotane across 18 centers. Mitotane serum levels were obtained from the Lysosafe Online® database or directly from the centers. Data from the cohort with plasma levels within the target range (≥14 mg/L; n = 319) were analyzed and compared to those with levels outside this range (n = 320).RESULTS: Fifty pediatric patients (60% female) diagnosed between 2004 and 2023 were included, with a median follow-up of 34.5 months and a 10-year overall survival of 33 months. The median age at diagnosis was 8.6 years, with most tumors (84%) hormone-secreting. Among 49 patients undergoing surgery, 31 (62%) achieved R0 resection. The median treatment duration was 18 months, with a median mitotane dose of 87 mg/kg/day in patients within the target plasma level range, showing no significant difference from those outside the range. However, BMI was significantly associated with doses of plasma levels in target range (P = 0.001), as underweight (105.4 mg/kg/day) and healthy weight patients (98.4 mg/kg/day) required higher doses than overweight/obese patients (44.4 mg/kg/day). No significant differences in daily dose levels (mg/kg/day and mg/m2/day) were observed based on body weight.CONCLUSION: This study supports estimating mitotane dosages in pediatric ACC, emphasizing the need for close monitoring and frequent follow-ups at specialized centers due to individualized dosing and a narrow therapeutic window.
U2 - 10.1530/EO-24-0081
DO - 10.1530/EO-24-0081
M3 - Article
C2 - 41503252
SN - 2634-4793
VL - 6
JO - Endocrine oncology
JF - Endocrine oncology
IS - 1
M1 - e240081
ER -