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Fidéline Bonnet-Serrano Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Hormonology Department, Cochin Hospital, Paris, France

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Maxime Barat Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Radiology Department, Cochin Hospital, Paris, France

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Anna Vaczlavik Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Anne Jouinot Inserm U1016-CNRS UMR8104, Paris, France

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Lucas Bouys Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Christelle Laguillier-Morizot Université Paris Cité, Paris, France
Hormonology Department, Cochin Hospital, Paris, France
INSERM, Physiopathologie et Pharmacotoxicologie Placentaire Humaine : Microbiote Pré & Post natal, Paris, France

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Corinne Zientek Hormonology Department, Cochin Hospital, Paris, France

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Catherine Simonneau Hormonology Department, Cochin Hospital, Paris, France

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Etienne Larger Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Diabetology Department, Cochin Hospital, Paris, France

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Laurence Guignat Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Lionel Groussin Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Guillaume Assié Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Jean Guibourdenche Université Paris Cité, Paris, France
Hormonology Department, Cochin Hospital, Paris, France
INSERM, Physiopathologie et Pharmacotoxicologie Placentaire Humaine : Microbiote Pré & Post natal, Paris, France

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Ioannis Nicolis Université Paris Cité, Paris, France
UR 7537 BioSTM, Paris, France

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Marie-Claude Menet Institut de Chimie Physique, Université Paris-Saclay-CNRS, UMR8000, Orsay, France

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Jérôme Bertherat Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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with tandem mass spectrometry (LC-MS/MS) in the basal state and after ACTH 1-24 stimulation. Materials and methods Patients and samples Patients investigated in the Endocrinology department of Cochin Hospital between 2018 December and 2021

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Supitcha Patjamontri Developmental Endocrinology Research Group, University of Glasgow, Royal Hospital for Children, Glasgow, UK
Division of Endocrinology and Metabolism, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand

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Alexander Spiers MRC Centre for Environment and Health, Imperial College London, London, UK
NIHR Health Protection Research Unit on Chemical Radiation Threats and Hazards, Imperial College London, London, UK

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Rachel B Smith MRC Centre for Environment and Health, Imperial College London, London, UK
NIHR Health Protection Research Unit on Chemical Radiation Threats and Hazards, Imperial College London, London, UK
National Institute for Health Research (NIHR) Health Protection Research Unit in Environmental Exposures and Health, Imperial College London, London, UK
Mohn Centre for Children’s Health and Wellbeing, Imperial College London, London, UK

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Chen Shen MRC Centre for Environment and Health, Imperial College London, London, UK
NIHR Health Protection Research Unit on Chemical Radiation Threats and Hazards, Imperial College London, London, UK

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Jo Adaway Department of Clinical Biochemistry, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK

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Brian G Keevil Department of Clinical Biochemistry, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK

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Mireille B Toledano MRC Centre for Environment and Health, Imperial College London, London, UK
NIHR Health Protection Research Unit on Chemical Radiation Threats and Hazards, Imperial College London, London, UK
National Institute for Health Research (NIHR) Health Protection Research Unit in Environmental Exposures and Health, Imperial College London, London, UK
Mohn Centre for Children’s Health and Wellbeing, Imperial College London, London, UK

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S Faisal Ahmed Developmental Endocrinology Research Group, University of Glasgow, Royal Hospital for Children, Glasgow, UK

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hormones as well as precursors and metabolites in the assay matrix leads to a greater chance of cross-reactivity. Liquid chromatography-mass spectrometry (LC-MS/MS) offers higher sensitivity and specificity with greater accuracy for steroid hormone

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Marcus Imamovic Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Nils Bäcklund Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Staffan Lundstedt Department of Medical Biosciences, Umeå University, Umeå, Sweden

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Göran Brattsand Department of Medical Biosciences, Umeå University, Umeå, Sweden

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Elisabeth Aardal Department of Clinical Chemistry and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden

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Tommy Olsson Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Per Dahlqvist Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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specificity ( 4 , 5 , 6 ). Cortisol analyses using liquid chromatography tandem mass spectrometry (LC-MS/MS) have eliminated the problems of cross-reactivity with exogenous steroids and cortisol metabolites often found with immunoassays ( 7 , 8 , 9 , 10

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Sarah Ying Tse Tan Department of Endocrinology, Singapore General Hospital, Singapore

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Hong Chang Tan Department of Endocrinology, Singapore General Hospital, Singapore

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Ling Zhu Department of Endocrinology, Singapore General Hospital, Singapore

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Lih Ming Loh Department of Endocrinology, Singapore General Hospital, Singapore

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Dawn Shao Ting Lim Department of Endocrinology, Singapore General Hospital, Singapore

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Du Soon Swee Department of Endocrinology, Singapore General Hospital, Singapore

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Yoke Ling Chan Department of Speciality Nursing, Singapore General Hospital, Singapore

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Huee Boon Lim Department of Speciality Nursing, Singapore General Hospital, Singapore

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Shiau Lee Ling Department of Speciality Nursing, Singapore General Hospital, Singapore

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En Jun Ou Department of Speciality Nursing, Singapore General Hospital, Singapore

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Wynn Ee Teo Department of Speciality Nursing, Singapore General Hospital, Singapore

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Xiao Ping Zhang Department of Speciality Nursing, Singapore General Hospital, Singapore

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Hui Fen Goh Department of Speciality Nursing, Singapore General Hospital, Singapore

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Peng Chin Kek Department of Endocrinology, Singapore General Hospital, Singapore

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mass spectrometry (LC-MS/MS) using multiple reaction monitoring in positive mode ( 36 ). The detection limit was 0.11 nmol/L. The intra-assay coefficient of variation was 7.2% at 3.0 nmol/L, and the inter-assay coefficient of variation was 5.8% at 1

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Paul-Martin Holterhus Department of Pediatrics I, Pediatric Endocrinology and Diabetology, University Hospital of Schleswig-Holstein, UKSH, Campus Kiel and Christian Albrechts University, CAU, Kiel, Germany

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Alexandra Kulle Department of Pediatrics I, Pediatric Endocrinology and Diabetology, University Hospital of Schleswig-Holstein, UKSH, Campus Kiel and Christian Albrechts University, CAU, Kiel, Germany

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Anne-Marie Till Department of Pediatrics, Pediatric Hematology and Oncology, University Hospital of Schleswig-Holstein, UKSH, Campus Lübeck, Germany

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Caroline Stille Department of Pediatrics, Pediatric Hematology and Oncology, University Hospital of Schleswig-Holstein, UKSH, Campus Lübeck, Germany

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Tabea Lamprecht Department of Pediatrics I, Pediatric Endocrinology and Diabetology, University Hospital of Schleswig-Holstein, UKSH, Campus Kiel and Christian Albrechts University, CAU, Kiel, Germany

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Simon Vieth Department of Pediatrics I, Pediatric Hematology and Oncology, University Hospital of Schleswig-Holstein, UKSH, Campus Kiel and Christian-Albrechts-University, CAU, Kiel, Germany

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Melchior Lauten Department of Pediatrics, Pediatric Hematology and Oncology, University Hospital of Schleswig-Holstein, UKSH, Campus Lübeck, Germany

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chromatography tandem mass spectrometry (LC–MS/MS) is today’s gold standard for determining serum steroids. We aimed to investigate LC–MS/MS steroid profiles of childhood ALL serum samples, encompassing cortisol and aldosterone as well as their precursors

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Martin Wiegand MRC Biostatistics Unit, School of Clinical Medicine, University of Cambridge, Cambridge, UK

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David J Halsall Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK

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Sarah L Cowan Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK

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Kevin Taylor Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK

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Robert J B Goudie MRC Biostatistics Unit, School of Clinical Medicine, University of Cambridge, Cambridge, UK

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Jacobus Preller Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK

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Mark Gurnell Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
Wellcome–MRC Institute of Metabolic Science, University of Cambridge and NIHR Cambridge Biomedical Research Centre, Addenbrooke’s Hospital, Cambridge, UK

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://doi.org/10.1056/NEJMoa2021436 ) 20 Hinchliffe E Carter S Owen LJ Keevil BG . Quantitation of aldosterone in human plasma by ultra high performance liquid chromatography tandem mass spectrometry . Journal of Chromatography: B, Analytical

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Riccardo Pofi Department of Endocrinology, Oxford Centre for Diabetes, Endocrinology and Metabolism and NIHR Oxford Biomedical Research Centre, Churchill Hospital, University of Oxford, Oxford, UK

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Ilaria Bonaventura Department of Experimental Medicine, Sapienza University of Rome, Viale Regina Elena, Rome, Italy

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Joanne Duffy Department of Clinical Chemistry and Immunology, Heartlands Hospital, Birmingham, UK

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Zoe Maunsell Department of Clinical Biochemistry, Oxford University Hospitals NHS Foundation Trust, Oxford, UK

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Brian Shine Department of Clinical Biochemistry, Oxford University Hospitals NHS Foundation Trust, Oxford, UK

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Andrea M Isidori Department of Experimental Medicine, Sapienza University of Rome, Viale Regina Elena, Rome, Italy

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Jeremy W Tomlinson Department of Endocrinology, Oxford Centre for Diabetes, Endocrinology and Metabolism and NIHR Oxford Biomedical Research Centre, Churchill Hospital, University of Oxford, Oxford, UK

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–liquid extraction by isotope dilution liquid chromatography-tandem mass spectrometry. Deuterated internal standard (Fludrocortisone D5, Sigma) was added to each sample, QC and calibrator followed by diethylether. Samples were mixed and then placed into an ethanol

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Angelica Sharma Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK

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Katharine Lazarus Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK

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Deborah Papadopoulou Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK

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Hemanth Prabhudev Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK

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Tricia Tan Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK
Department of Clinical Biochemistry, North West London Pathology, London, UK

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Karim Meeran Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK

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Sirazum Choudhury Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK
Department of Clinical Biochemistry, North West London Pathology, London, UK

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mass spectrometry (Waters Quattro Premier Mass Spectrometer). The assay is controlled using custom internal quality controls and is a UKAS-accredited assay. This method has demonstrated intra-assay and inter-assay coefficient variations of 2.7 and 4

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Ramjan Sanas Mohamed Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK

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Biyaser Abuelgasim Imperial College School of Medicine, Department of Biochemistry, Imperial College Healthcare NHS Trust, London, UK

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Sally Barker Imperial College School of Medicine, Department of Biochemistry, Imperial College Healthcare NHS Trust, London, UK

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Hemanth Prabhudev Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK

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Niamh M Martin Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK
Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, UK

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Karim Meeran Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK
Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, UK

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Emma L Williams Department of Biochemistry, Imperial College Healthcare NHS Trust, London, UK

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Sarah Darch Department of Biochemistry, Imperial College Healthcare NHS Trust, London, UK

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Whitlock Matthew Department of Biochemistry, Imperial College Healthcare NHS Trust, London, UK

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Tricia Tan Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK
Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, UK

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Florian Wernig Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK

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. Salivary cortisone can be reliably measured by liquid chromatography-tandem mass spectrometry (LC-MS/MS) ( 7 ). There is no evidence of 11B-HSD2 activity in collected saliva. Therefore, measurement of salivary cortisone is particularly useful when

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Simone Martins de Castro Hospital Materno Infantil Presidente Vargas, Newborn Screening Referral Center, Porto Alegre, RS, Brazil
Department of Analysis, Universidade Federal do Rio Grande do Sul (UFRGS), School of Pharmacy, Porto Alegre, RS, Brazil

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Paloma Wiest Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil

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Poli Mara Spritzer Division of Endocrinology, Department of Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil

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Cristiane Kopacek Hospital Materno Infantil Presidente Vargas, Newborn Screening Referral Center, Porto Alegre, RS, Brazil
Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
Department of Pediatrics, Universidade Federal do Rio Grande do Sul (UFRGS), Medical School, Porto Alegre, RS, Brazil

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spectrometry . Clinica Chimica Acta 2010 411 222 – 228 . ( https://doi.org/10.1016/j.cca.2009.11.007 ) 29 Carvalho VM Nakamura OH & Vieira JGH . Simultaneous quantitation of seven endogenous C-21 adrenal steroids by liquid chromatography tandem mass

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