ESPE Abstracts

Aggrecan is a structural glycoprotein of the extracellular matrix of cartilage present in the articular cartilage, growth plate and cartilage of the intervertebral disc. Biallelic pathogenic variants are the cause of aggrecan type spondyloepiphyseal dysplasia (OMIM#612813) while the presence of heterozygous pathogenic variants determine Kimberley type spondyloepiphyseal dysplasia (OMIM#608361) and short stature associated or not with acceleration of bone maturation and early o...

Introduction: Noonan syndrome (NS) is one of a group of diseases known as rasopathies, which share a common molecular substrate: alterations in the RAS-MAPK signaling pathway. NS is characterized by clinical and genetic heterogeneity. Up to 50% of cases are caused by variants in the PTPN11 gene, although more than 10 genes have been identified as involved in the pathogenesis of this disease with marked clinical overlap.Objectives...

Background: Precocious puberty (PP) in girls is most frequently an idiopathic gonadotropin-releasing hormone (GnRH)-dependent PP, being thelarche the typical first sign. It is well established that increased dehydroepiandrosterone sulphate (DHEAS) levels are associated with premature adrenarche and may characterize PP too. However, its relationship with signs of hypothalamic-pituitary-gonadal (HPG) axis activation and estrogen exposure is still to be elucidate...

Cribiform Papillary Thyroid Carcinoma has low prevalence. Our objective is to present a case and to emphasize future implications. We present a female 14.9 years old patient with PWS (del 15 q11-13 by methylation test) with a history of asthma, hepatic steatosis, increased Waist-to-Height ratio, HbA1c 5.86 % and C-Peptide 3.64 ng/mL. She had primary hypotiroidism since 7 years old treated with 25 mg/ day of levothyroxine and impaired fasting glucose since 10 years old with a B...

Background: Autoimmune polyendocrinopathy candidiasis ectodermal dystrophy (APECED) or autoimmune polyendocrinopathy type 1 (APS-1) is a rare monogenic autosomal recessive disease due to pathogenic variants in the AIRE gene. APECED usually begins during early childhood with chronic mucocutaneous candidiasis (CMC), followed by hypopathyroidism (HP) and Addison’s disease (AD); however, other endocrine and non-endocrine components may occur with a different prevalen...

Background: Monogenic diabetes (MD) remains undiagnosed in more than 90% of the cases. However, precise, quick and cost-effective diagnosis is important to choose an adequate treatment and to avoid long-term complications.Objective and hypotheses: To develop and validate a diagnostic tool to improve diagnosis rate of MD in Switzerland, as well as to open new research directions.Method: Targeted next-generation sequencing (NGS) of 3...

Background: Differences of sex development (DSDs) (conditions with atypical development of chromosomal, gonadal or anatomic sex) are classified into three groups: sex chromosome DSD, 46,XYDSD and 46,XX DSD. Around 1 newborn in 5000 presents ambiguous genitalia with a major challenge for male or female assignment. The identification of a genetic cause can contribute to a correct diagnosis and to optimize both management and genetic counselling.<p class="abs...

Background: Neonatal diabetes mellitus is defined by severe hyperglycemia appearing before 6 months of age. It occurs in about one in 200 000 live births and most cases are known to be of monogenic origin. Classical autoimmune type 1 diabetes mellitus (DM) is exceptional in this age group.Objective and hypotheses: Recently non-HLA type 1 DM susceptibility genes, such as IL18RAP, influencing the rate of progression to diabetes among children with...

Background: 25-Hydroxyvitamin D (25(OH)D) deficiency is reported to be common in patients with rheumatoid arthritis and associated with disease activity, physical disability, and cardiometabolic intermediates; data in patients with juvenile idiopathic arthritis (JIA) are inconsistent.Objective and hypotheses: To assess serum 25(OH)D in children, adolescents, and young adults with JIA, and to identify the risk factors for vitamin D deficiency in JIA patie...

Background: Familial glucocorticoid deficiency (FGD) is a rare and potentially life-threatening disease, characterized by adrenal insufficiency without mineralocorticoid deficiency. It is diagnosed during the neonatal period but also in childhood. Manifestations are recurrent hypoglycemia, seizures or even coma, chronic fatigue, recurrent infections and skin hyperpigmentation. Mutations on mineralocorticoid receptor 2 (MC2R) gene and on melanocortin-2 receptor accesso...