IMPE Abstracts

Constitutional delay of puberty (CDP) and congenital central hypogonadism (CH) show great overlap in clinical features and in gonadotrophin and testosterone serum concentrations in boys. The gold standard to distinguish both entities relies on the assessment of pubertal stage beyond 18 years of age. The long lasting insufficient FSH activity in boys with congenital CH may result in lower AMH and inhibin B serum concentrations compared with boys with CDP....

Background: Current safety of Recombinant human growth hormone (rhGH) treatment arises mainly from postmarketing surveillance. Headache is a relatively frequent symptom in children under rhGH. Secondary intracranial hypertension (SIH), is an adverse effect (AE), usually occurring within the first 12 weeks of treatment associated to headaches. Permanent visual defects are the most feared complication. Scarce information exists regarding incidence and natural hi...

Background: Persistent hypoglycemia in pediatric patients is the clinical manifestation of different hormonal and metabolic disorders and expose them to a high risk of brain damage. Appropriate management should include staggered strategy to achieve the underlying etiology.Aim: To describe an infant with recurrent hypoglycemia due to Stage 4 Neuroblastoma (4SNB) behaving as an “IGF2-OMA”.<p class="abstext...

Human growth is highly dependent on the GH-IGF-I axis. GH binding to GH receptor activates janus kinase 2 (JAK2)-signal transducer and activator of transcription 5b (STAT5b) pathway which stimulates transcription of IGF1, IGFBP3, and IGFALS. Although STAT5b deficiency was established as an autosomal recessive disorder, heterozygous dominant-negative STAT5B variants were reported in patients with less severe growth deficit and milder immune dysfunction. Our aim was to develop a...

Background and Objective: Daily injections of growth hormone (GH) are the standard treatment for pediatric GH deficiency (pGHD). Long-acting GH have been developed for pGHD and may soon be available in Latin American (LATAM) markets. The objective of this preference exercise was to elicit treatment priorities and practices in pediatric GH deficiency among experts in Latin America.Methods: A panel of experts in pediatric ...

Introduction: Beckwith-Wiedemann syndrome (BWS) is an overgrowth syndrome caused by genetic or epigenetic defects within the chromosome 11p15.5 region. BWS growth pattern with accelerated growth during infancy is widely known, and whenever there is a change in the expected growth, further investigation is warranted.Objective: To describe a patient with BWS and growth failure.Case report:</s...

Introduction: MS-MLPA is a specific and sensitive technique for detecting copy number variants and methylation defects in the regions of interest associated with imprinting diseases as Beckwith-Wiedemann (BWS) and Silver Russell (SRS) syndromes and. Both are growth disorders associated with opposite molecular alterations in the 11p15.5 imprinting locus.Aim: To analyze the diagnostic efficiency of MS-MLPA in a cohort of p...

Introduction: SOFT syndrome (MIM#614813), denoting Short stature, Onychodysplasia, Facial dysmorphism, and hypoTrichosis, is a rare primordial dwarfism syndrome encompassing severe growth failure of prenatal onset, craniofacial dysmorphism, sparse hair, and digital abnormalities associated with biallelic pathogenic POC1Agene variants. Phenotypic spectrum has recently been expanded to include insulin resistance (IR) and muscle cramps.<p class="abst...

Introduction: Short Stature (SS), defined as height below -2 SD, is a common reason for referral to pediatric endocrinologists. Genetic factors determine ~80% of adult height. Lately, next-generation sequencing (NGS) has led to the discovery of an increasing number of novel monogenic causes for SS.Objective: The aim of this work was to identify the genetic etiology of SS of unknown origin (SSUO) in children.<p class=...

Introduction: Silver-Russell Syndrome (SRS) is a genetic disorder characterized by intrauterine and postnatal growth restriction, relative macrocephaly and protruding forehead in early life, body asymmetry and feeding difficulties. Although several genetic mechanisms that cause the syndrome are known, more than 40% of patients with an SRS-like phenotype remains without an etiological diagnosis. In the last few years, clinical reports have suggested that single...