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Nathalie Ly Department of Endocrinology and Reproductive Medicine, Reference Center for Rare Endocrine Diseases of Growth and Development, Reference Center for Gynecological Rare Diseases, Hôpitaux Universitaires Pitié Salpêtrière-Charles Foix, Paris, France
EndoERN, APHP Consortium Pitie Salpetriere Hospital, Necker Hospital, Paris, France

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Sophie Dubreuil Department of Endocrinology and Reproductive Medicine, Reference Center for Rare Endocrine Diseases of Growth and Development, Reference Center for Gynecological Rare Diseases, Hôpitaux Universitaires Pitié Salpêtrière-Charles Foix, Paris, France
EndoERN, APHP Consortium Pitie Salpetriere Hospital, Necker Hospital, Paris, France

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Philippe Touraine Department of Endocrinology and Reproductive Medicine, Reference Center for Rare Endocrine Diseases of Growth and Development, Reference Center for Gynecological Rare Diseases, Hôpitaux Universitaires Pitié Salpêtrière-Charles Foix, Paris, France
EndoERN, APHP Consortium Pitie Salpetriere Hospital, Necker Hospital, Paris, France
Sorbonne University, Paris, France

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Objective

Growth hormone (GH) and insulin-like growth factors (IGFs) are not mandatory for reproductive life, but data suggest their synergistic action with follicle-stimulating hormone throughout ovarian folliculogenesis. We aimed to evaluate the association of IGF-1 level on clinical pregnancy rate after ovarian stimulation, with or without intrauterine insemination, in women with GH deficiency (GHD) treated with GH replacement therapy (GHRT) at conception.

Design and methods

Data from 19 women with both GHD and hypogonadotropic hypogonadism referred to our reproductive medicine department were retrospectively collected. IGF-1 levels were assessed in a single laboratory, and values were expressed in s.d. from the mean.

Results

Amongst the seven patients receiving GHRT during ovarian stimulation, higher IGF-1 levels were significantly associated with clinical pregnancy (+0.4 s.d. vs–1.6 s.d., P = 0.03). Amongst the 24 pregnancies obtained by the 19 infertile patients, pregnancy loss was less frequent with the addition of GHRT than without (1 miscarriage out of 8 total pregnancies vs 4 miscarriages out of 16 total pregnancies).

Conclusions

This is the first study evaluating the association of IGF-1 level on clinical pregnancy rate in GH-treated women at conception. When taking care of female infertility due to hypogonadotropic hypogonadism, practitioners should enquire about the associated GHD and IGF-1 levels. To ensure higher clinical pregnancy chances, practitioners should aim for IGF-1 values at conception, ranging from 0 s.d. to +2 s.d., and, if necessary, could discuss initiation or increase GH treatment. Prospective studies should help strengthen our results.

Open access
Anne Bachelot Department of Endocrinology and Reproductive Medicine and Centre de Référence des Maladies Endocriniennes Rares de la croissance et Centre des Pathologies gynécologiques Rares, AP-HP, IE3M, Hôpital Pitié-Salpêtrière, ICAN, Paris, France
UPMC Univ, Paris, France

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Magaly Vialon Department of Endocrinology and Reproductive Medicine and Centre de Référence des Maladies Endocriniennes Rares de la croissance et Centre des Pathologies gynécologiques Rares, AP-HP, IE3M, Hôpital Pitié-Salpêtrière, ICAN, Paris, France

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Amandine Baptiste AP-HP, Clinical Research Unit Paris Descartes Necker Cochin, Paris, France

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Isabelle Tejedor Department of Endocrinology and Reproductive Medicine and Centre de Référence des Maladies Endocriniennes Rares de la croissance et Centre des Pathologies gynécologiques Rares, AP-HP, IE3M, Hôpital Pitié-Salpêtrière, ICAN, Paris, France

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Caroline Elie AP-HP, Clinical Research Unit Paris Descartes Necker Cochin, Paris, France

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Michel Polak Department of Pediatric Endocrinology, Gynecology and Diabetology, Centre de Référence des Maladies Endocriniennes Rares de la Croissance et Centre des pathologies gynécologiques Rares, Hôpital Universitaire Necker Enfants malades, Paris, France
Université Paris Descartes, Paris, France

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Philippe Touraine Department of Endocrinology and Reproductive Medicine and Centre de Référence des Maladies Endocriniennes Rares de la croissance et Centre des Pathologies gynécologiques Rares, AP-HP, IE3M, Hôpital Pitié-Salpêtrière, ICAN, Paris, France
UPMC Univ, Paris, France

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the CRMERC study group
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Background

Health-related quality of life (QoL) in adult patients with congenital adrenal hyperplasia (CAH) has been variously reported. However, there is no study evaluating the impact of transition on quality of life.

Methods

Adult patients with classic or non-classic CAH diagnosed during childhood CAH, born between 1970 and 1990, were recruited from the registers of Pediatric departments belonging to the French reference center for endocrine rare disease. Primary end point was the QoL (WHOQOL-BREF).

Results

Seventy-three patients were included in the study, among them 59/73 were transferred to adult endocrinologist by their pediatricians for transition. WHOQOL-BREF scores were similar between patients with or without transition to specialist adult services, except for environment dimension score, which was slightly higher in CAH patients without transition. However, CAH patients with a regular follow-up had a better physical health, psychological health and environment score and item global QoL than the group without regular follow-up after transition.

Conclusion

Regular medical follow-up in adulthood is associated with the transition between pediatric and adult care and is associated with better QoL in adults with CAH.

Open access
Virginie Grouthier Department of Endocrinology and Reproductive Medicine, GH La Pitié-Salpêtrière Charles-Foix, Center for Rare Gynecological Diseases, Paris, France
Department of Endocrinology, Diabetes and Nutrition, University Hospital of Bordeaux, Bordeaux, France

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Zeina Chakhtoura Department of Endocrinology and Reproductive Medicine, GH La Pitié-Salpêtrière Charles-Foix, Center for Rare Gynecological Diseases, Paris, France

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Isabelle Tejedor Department of Endocrinology and Reproductive Medicine, GH La Pitié-Salpêtrière Charles-Foix, Center for Rare Gynecological Diseases, Paris, France

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Yasmina Badachi Department of General Radiology, GH La Pitié-Salpêtrière Charles-Foix, Paris, France

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Vincent Goffin Inserm U1151 – CNRS UMR 8253, Institut Necker Enfants Malades (INEM), Faculté de Médecine Paris Descartes, Paris, France

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Philippe Touraine Department of Endocrinology and Reproductive Medicine, GH La Pitié-Salpêtrière Charles-Foix, Center for Rare Gynecological Diseases, Paris, France
Sorbonne Université, F-75013, Paris, France

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Objective

Multiple fibroadenomas (MFA) of the breast is a rare benign disease, thus its natural history is poorly understood. The aim of our study was to describe the radiological evolution of MFA and to evaluate the influence of different factors on this evolution.

Methods

This was a longitudinal cohort study. All patients included had two clinical and radiological assessments (breast ultrasound (US) and/or MRI) at least 5 years apart.

Results

Seventy-two women were followed for 7.6 ± 2.1 years. The radiological evolution showed a decrease or stability in the number of fibroadenomas (FA) in 26/44 cases on the MRI and in 38/64 cases on the US. There was a decrease of size in 35/44 cases on the MRI and in 53/64 cases on the US. An increase in the number of FAs was found in 18/44 cases in the MRI and 26/64 cases in the US with, for the majority, a decrease of size (19/26 by MRI and 16/18 by MRI). Older age at the first FA (P < 0.0001) and at the diagnosis of MFA (P < 0.0001), pregnancy (P = 0.003) and progestin use (P < 0.001), particularly lynestrenol (P < 0.0001), had a beneficial effect on the evolution of MFA.

Conclusion

This is the first longitudinal study describing women with MFA. The radiological evolution of MFA seamed favorable and similar to that expected for a single FA. We identified factors influencing the evolution of the disease, including progestin treatments such as lynestrenol, which could have a beneficial effect. Our cohort should be followed further in order to expand our knowledge of MFA, especially concerning the risk of breast cancer.

Open access
Isabelle Flechtner Center for Rare Gynecological Disorders, Centre des Pathologies Gynécologiques Rares, Paris, France
Department of Paediatric Endocrinology, Gynaecology, and Diabetology, AP-HP, Necker-Enfants Malades University Hospital, IMAGINE Institute affiliate, Paris, France

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Magali Viaud Center for Rare Gynecological Disorders, Centre des Pathologies Gynécologiques Rares, Paris, France
Department of Paediatric Endocrinology, Gynaecology, and Diabetology, AP-HP, Necker-Enfants Malades University Hospital, IMAGINE Institute affiliate, Paris, France

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Dulanjalee Kariyawasam Department of Paediatric Endocrinology, Gynaecology, and Diabetology, AP-HP, Necker-Enfants Malades University Hospital, IMAGINE Institute affiliate, Paris, France

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Marie Perrissin-Fabert Center for Rare Gynecological Disorders, Centre des Pathologies Gynécologiques Rares, Paris, France
Department of Paediatric Endocrinology, Gynaecology, and Diabetology, AP-HP, Necker-Enfants Malades University Hospital, IMAGINE Institute affiliate, Paris, France

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Maud Bidet Center for Rare Gynecological Disorders, Centre des Pathologies Gynécologiques Rares, Paris, France
Department of Paediatric Endocrinology, Gynaecology, and Diabetology, AP-HP, Necker-Enfants Malades University Hospital, IMAGINE Institute affiliate, Paris, France

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Anne Bachelot Center for Rare Gynecological Disorders, Centre des Pathologies Gynécologiques Rares, Paris, France
Department of Endocrinology and Reproductive Medicine, AP-HPIE3M, Hôpital Pitié-Salpêtrière, ICAN, Paris, France

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Philippe Touraine Center for Rare Gynecological Disorders, Centre des Pathologies Gynécologiques Rares, Paris, France
Department of Endocrinology and Reproductive Medicine, AP-HPIE3M, Hôpital Pitié-Salpêtrière, ICAN, Paris, France

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Philippe Labrune Department of Pediatrics, APHP, Centre de Référence des Maladies héréditaires du Métabolisme Hépatique, Hopital Antoine Béclère and Paris Sud University, Clamart, France

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Pascale de Lonlay Reference Center of Inherited Metabolic Diseases, Université de Paris, Necker Enfants Malades, University Hospital, Paris, France
Centre for Rare Gynecological Disorders, Hospital Universitaire Necker-Enfants Malades, Paediatric Endocrinology, Gynaecology and Diabetology, AP-HP, Université de Paris, Paris, France

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Michel Polak Center for Rare Gynecological Disorders, Centre des Pathologies Gynécologiques Rares, Paris, France
Department of Paediatric Endocrinology, Gynaecology, and Diabetology, AP-HP, Necker-Enfants Malades University Hospital, IMAGINE Institute affiliate, Paris, France
Centre for Rare Gynecological Disorders, Hospital Universitaire Necker-Enfants Malades, Paediatric Endocrinology, Gynaecology and Diabetology, AP-HP, Université de Paris, Paris, France

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Classic galactosemia is a rare inborn error of galactose metabolism with a birth prevalence of about 1/30,000–60,000. Long-term complications occurring despite dietary treatment consist of premature ovarian insufficiency (POI) and neurodevelopmental impairments. We performed with the French Reference Centers for Rare Diseases a multisite collaborative questionnaire survey for classic galactosemic patients. Its primary objective was to assess their puberty, pregnancy, gonadotropic axis, and pelvic morphology by ultrasound. The secondary objective was to determine predictive factors for pregnancy without oocyte donation. Completed questionnaires from 103 patients, 56 females (median age, 19 years (3–52 years)) and 47 males (median age, 19 years (3–45 years)), were analyzed. Among the 43 females older than 13 years old, mean age for breast development first stage was 13.8 years; spontaneous menarche occurred in 21/31 females at a mean age of 14.6 years. In these 21 women, 62% had spaniomenorrhea and 7/17 older than 30 years had amenorrhea. All age-groups confounded, FSH was above reference range for 65.7% of the patients, anti-Müllerian hormone and inhibin B were undetectable, and the ovaries were small with few or no follicles detected. Among the 5 females who sought to conceive, 4 had pregnancies. Among the 47 males, 1 had cryptorchidism, all have normal testicular function and none had a desire to conceive children. Thus, spontaneous puberty and POI are both common in this population. Spontaneous menarche seems to be the best predictive factor for successful spontaneous pregnancy.

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Enora Le Roux Université de Paris, ECEVE UMR 1123, Inserm, Paris, France
AP-HP.Nord-Université de Paris, Hôpital Universitaire Robert Debré, Unité d’Épidémiologie Clinique, Inserm, Paris, France

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Florence Menesguen AP-HP. Sorbonne Université, Hôpital Universitaire Pitié Salpêtrière-Charles Foix, Service d’Endocrinologie et Médecine de la Reproduction, Centre de Maladies Endocriniennes Rares de la Croissance et du Développement, Centre de Pathologies Gynécologiques Rares, Paris, France

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Isabelle Tejedor AP-HP. Sorbonne Université, Hôpital Universitaire Pitié Salpêtrière-Charles Foix, Service d’Endocrinologie et Médecine de la Reproduction, Centre de Maladies Endocriniennes Rares de la Croissance et du Développement, Centre de Pathologies Gynécologiques Rares, Paris, France

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Marc Popelier AP-HP. Sorbonne Université, Hôpital Universitaire Pitié Salpêtrière-Charles Foix, Service de Diabétologie, Paris, France

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Marine Halbron AP-HP. Sorbonne Université, Hôpital Universitaire Pitié Salpêtrière-Charles Foix, Service de Diabétologie, Paris, France

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Pauline Faucher AP-HP. Sorbonne Université, Hôpital Universitaire Pitié Salpêtrière-Charles Foix, Service de Nutrition, Centre du Syndrome de Prader-Willi et Autres Obésités Rares, Paris, France

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Sabine Malivoir AP-HP. Sorbonne Université, Hôpital Universitaire Pitié Salpêtrière-Charles Foix, Service d’Endocrinologie et Médecine de la Reproduction, Centre de Maladies Endocriniennes Rares de la Croissance et du Développement, Centre de Pathologies Gynécologiques Rares, Paris, France

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Graziella Pinto AP-HP.Université de Paris Centre, Hôpital Universitaire Necker Enfants Malades, Département d’Endocrinologie, Diabétologie et Gynécologie Pédiatrique, Paris, France; Centre de Maladies Endocriniennes Rares de la Croissance et du Développement, Centre de Pathologies Gynécologiques Rares, Paris, France

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Juliane Léger AP-HP.Nord-Université de Paris, Hôpital Universitaire Robert Debré, Service d’Endocrinologie Diabétologie Pédiatrique, Centre de Référence des Maladies Endocriniennes de la Croissance et du Développement, Paris, France

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Stephane Hatem Institute of Cardiology and Nutrition, Paris, France

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Michel Polak AP-HP.Université de Paris Centre, Hôpital Universitaire Necker Enfants Malades, Département d’Endocrinologie, Diabétologie et Gynécologie Pédiatrique, Paris, France; Centre de Maladies Endocriniennes Rares de la Croissance et du Développement, Centre de Pathologies Gynécologiques Rares, Paris, France

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Christine Poitou AP-HP. Sorbonne Université, Hôpital Universitaire Pitié Salpêtrière-Charles Foix, Service de Nutrition, Centre du Syndrome de Prader-Willi et Autres Obésités Rares, Paris, France

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Philippe Touraine AP-HP. Sorbonne Université, Hôpital Universitaire Pitié Salpêtrière-Charles Foix, Service d’Endocrinologie et Médecine de la Reproduction, Centre de Maladies Endocriniennes Rares de la Croissance et du Développement, Centre de Pathologies Gynécologiques Rares, Paris, France

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Objective

The transition from paediatric to adult medicine involves risks of poor patient outcomes and of significant losses of patients to follow up. The research aimed to analyse the implementation in an initial cohort of patients of a new programme of transition to adult care based on a case management approach.

Design

A longitudinal study of the case management approach to transition, initiated in a university hospital in France in September 2016.

Methods

Patients with the endocrine or metabolic disease diagnosed during childhood and transferred to adult care were included. The transition programme includes three steps based on case management: liaising with paediatric services, personalising care pathways, and liaising with structures outside the hospital (general practitioners, agencies in the educational and social sector).

Results

The cohort included 500 patients, with malignant brain tumour (n = 56 (11%)), obesity (n = 55 (11%)), type 1 diabetes (n = 54 (11%)), or other disease (n = 335 (67%)). Their median age at transfer was 19, and the sex ratio was 0.5. At median 21 months of follow-up, 439 (88%) had a regular follow-up in or outside the hospital, 47 (9%) had irregular follow-up (absence at the last appointment or no appointment scheduled within the time recommended), 4 had stopped care on doctor’s advice, 4 had died, 3 had moved, and 3 had refused care. The programme involved 9615 case management actions; 7% of patients required more than 50 actions. Patients requiring most support were usually those affected by a rare genetic form of obesity.

Conclusions

Case managers successfully addressed the complex needs of patients. Over time, the cohort will provide unprecedented long-term outcome results for patients with various conditions who experienced this form of transition.

Open access
Dafydd Aled Rees Cardiff University, Cardiff, United Kingdom

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Deborah P Merke National Institutes of Health Clinical Center and the Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, USA

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Wiebke Arlt MRC LMS, London, United Kingdom

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Aude Brac De La Perriere Hospices Civils de Lyon - GHE - Endocrinologie, Bron, France

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Angelica Linden Hirschberg Karolinska Institute, Solna, Sweden

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Anders Juul Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark, and Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark

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John Newell-Price The University of Sheffield, Sheffield, United Kingdom

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Alessandro Prete University of Birmingham, Birmingham, United Kingdom

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Nicole Reisch Endokrinologie, Nephrologie und weitere Sektionen - Medizinische Klinik und Poliklinik IV - Campus Innenstadt, München, Germany

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Nike M Stikkelbroeck Radboud University Nijmegen, Nijmegen, Netherlands

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Philippe A Touraine University Hospitals Pitié Salpêtrière - Charles Foix, Paris, France

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Alex Lewis Neurocrine Biosciences Inc, London, United Kingdom

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John Porter Neurocrine Biosciences Inc, London, United Kingdom

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Helen Coope Neurocrine Biosciences Inc, London, United Kingdom

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Richard J Ross The University of Sheffield, Sheffield, United Kingdom

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Background

Prednisolone and prednisone are recommended treatment options for adults with congenital adrenal hyperplasia (CAH); however, there is no randomised comparison of prednis(ol)one with hydrocortisone.

Design

Six-month open-label randomised phase 3 study and interim analysis of a single-arm extension study was the design of the study.

Methods

The method of the study was hydrocortisone dose equivalent and 09:00-h 17-hydroxyprogesterone (17OHP) from 48 patients taking prednis(ol)one at baseline.

Results

At baseline, the median hydrocortisone dose equivalent was 30 mg/day and 17OHP was < 36 nmol/L (3× upper limit of normal) in 56% of patients. Patients were randomised to continue prednis(ol)one or switch to modified-release hydrocortisone capsule (MRHC) at the same hydrocortisone-equivalent dose. At 4 weeks, 94% on MRHC and 71% on prednis(ol)one had 17OHP < 36 nmol/L. At 18 months in the extension study of MRHC, the median MRHC dose was 20 mg/day and 82% had 17OHP < 36 nmol/L. The per cent of patients with 17OHP < 36 nmol/L on a hydrocortisone dose equivalent ≤ 25 mg/day was greater at 18 months in the extension study on MRHC than while on prednis(ol)one at baseline: 57% vs 27%, P = 0.04. In the randomised study, no patients had an adrenal crisis on MRHC and one on prednisolone. In the extension study (221 patient years), there were 12 adrenal crises in 5 patients (5.4/100 patient years).

Conclusion

MRHC reduces 17OHP at 09:00 h compared to prednis(ol)one and the dose of MRHC can be down-titrated over time in the majority of patients.

Open access
Luca Persani Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
Department of Endocrinology and Metabolic Diseases, IRCCS Istituto Auxologico Italiano, Milan, Italy

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Martine Cools Departments of Internal Medicine and Paediatrics and of Paediatric Endocrinology, Ghent University Hospital, Ghent, Belgium

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Stamatina Ioakim Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy

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S Faisal Ahmed Developmental Endocrinology Research Group, School of Medicine, Dentistry & Nursing, University of Glasgow, Glasgow, United Kingdom

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Silvia Andonova National Genetic Laboratory, UHOG “Maichin dom", Medical University, Sofia, Bulgaria

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Magdalena Avbelj-Stefanija Department for Pediatric Endocrinology, Diabetes and Metabolic Diseases, University Children's Hospital, University Medical Centre Ljubljana, Ljubljana, Slovenia

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Federico Baronio Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy

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Jerome Bouligand Université Paris-Saclay, Inserm UMRS1185 & Service de Génétique Moléculaire, Pharmacogénétique et Hormonologie, Hôpital Bicêtre, France

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Hennie T Bruggenwirth Department of Clinical Genetics, Erasmus MC, University Medical Center, Rotterdam, The Netherlands

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Justin H Davies Faculty of Medicine, University of Southampton, Southampton, United Kingdom

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Elfride De Baere Departments of Internal Medicine and Paediatrics and of Paediatric Endocrinology, Ghent University Hospital, Ghent, Belgium

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Iveta Dzivite-Krisane Children’s University Hospital, Riga, Latvia

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Paula Fernandez-Alvarez Department of Clinical and Molecular Genetics, Vall d'Hebron University Hospital, Barcelona, Spain

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Alexander Gheldof Center for Medical Genetics, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, Brussels, Belgium

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Claudia Giavoli Unit of Endocrinology, Fondazione IRCCS Ospedale Maggiore Policlinico, Milano, Italy
Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy

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Claus H Gravholt Departments of Endocrinology, of Clinical Medicine and of Molecular Medicine, Aarhus University, Aarhus, Denmark

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Olaf Hiort University Hospital Schleswig-Holstein, Campus Lübeck, and University of Lübeck, Lübeck, Germany

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Paul-Martin Holterhus University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany

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Anders Juul Departments of Growth and Reproduction and of Clinical Medicine, Copenhagen University Hospital – Rigshospitalet, Copenhagen, Denmark

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Csilla Krausz Endocrinology and Andrology Units, University Hospital of Careggi and Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy

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Kristina Lagerstedt-Robinson Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden

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Ruth McGowan Developmental Endocrinology Research Group, School of Medicine, Dentistry & Nursing, University of Glasgow, Glasgow, United Kingdom
West of Scotland Centre for Genomic Medicine, Queen Elizabeth University Hospital, Glasgow, United Kingdom

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Uta Neumann Charité Medicine University, Berlin, Germany

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Antonio Novelli Translational Cytogenomics Research Unit, Bambino Gesù Children's Hospital IRCCS, Rome, Italy

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Xavier Peyrassol Universitè Libre di Bruxelles, Brussels, Belgium

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Leonidas A Phylactou Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus

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Julia Rohayem University Hospital Münster, Munster, Germany

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Philippe Touraine Center for Rare Endocrine and Gynecological Disorders, Department of endocrinology and reproductive Medicine, Hospital Pitié Salpêtrière, Paris, France

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Dineke Westra Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands

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Valeria Vezzoli Department of Endocrinology and Metabolic Diseases, IRCCS Istituto Auxologico Italiano, Milan, Italy

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Raffaella Rossetti Department of Endocrinology and Metabolic Diseases, IRCCS Istituto Auxologico Italiano, Milan, Italy

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Differences of sex development and maturation (SDM) represent a heterogeneous puzzle of rare conditions with a large genetic component whose management and treatment could be improved by an accurate classification of underlying molecular conditions, and next-generation sequencing (NGS) should represent the most appropriate approach. Therefore, we conducted a survey dedicated to the use and potential outcomes of NGS for SDM disorders diagnosis among the 53 health care providers (HCP) of the European Reference Network for rare endocrine conditions. The response rate was 49% with a total of 26 HCPs from 13 countries. All HCPs, except 1, performed NGS investigations for SDM disorders on 6720 patients, 3764 (56%) with differences of sex development (DSD), including 811 unexplained primary ovarian insufficiency, and 2956 (44%) with congenital hypogonadotropic hypogonadism (CHH). The approaches varied from targeted analysis of custom gene panels (range: 11–490 genes) in 81.5% of cases or whole exome sequencing with the extraction of a virtual panel in the remaining cases. These analyses were performed for diagnostic purposes in 21 HCPs, supported by the National Health Systems in 16 cases. The likelihood of finding a variant ranged between 7 and 60%, mainly depending upon the number of analysed genes or criteria used for reporting, most HCPs also reporting variants of uncertain significance. These data illustrate the status of genetic diagnosis of DSD and CHH across Europe. In most countries, these analyses are performed for diagnostic purposes, yielding highly variable results, thus suggesting the need for harmonization and general improvements of NGS approaches.

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