ESPE Abstracts

Beckwith Wiedemann syndrome (BWS) is a rare overgrowth disorder characterised by macroglossia, exomphalos, lateralised overgrowth, organomegaly, hyperinsulinism, and an increased risk of embryonic tumor during early life. In about 80% of BWS cases, molecular defects are identified at the imprinted 11p15.5 region which contains the IGF2 and the CDKN1C genes (most patients show methylation defects at either imprinting control region IC1 or IC2, or paternal unip...

Beckwith-Wiedemann syndrome (BWS) is a congenital tumor-predisposition syndrome of which around 70% develops because of the methylation defects in the imprinted genes at chromosome 11p15.5. KCNQ1OT1 hypomethylation is the most common underlying genetic aberration in sporadic the BWS, accounting for 50% of the sporadic cases but confers the least tumor risk. We present a 5 month-old girl who presented with an excessive weight gain, cushingoid face, arrested gro...

Background: Beckwith-Wiedemann Syndrome (BWS) is an overgrowth disorder involving a predisposition to tumor development, etiologically connected with genetic/epigenetic dysregulation. The main features of BWS include omphalocele, macroglossia and macrosomia; however there is significant clinical heterogeneity. SHOX mutation is a frequent cause of short stature with high penetrance, but extremely variable clinical expression. The mean adult height is -2.2 SDS. The presence of m...

Background: Beckwith–Wiedemann Syndrome (BWS) is a clinical and genetically heterogeneous entity encompassing overgrowth and variable manifestations. Early diagnosis of BWS is crucial due to the increased risk for developing embryonal malignancies (mainly below 5 years of age).Objective: We aimed to screen the presence of underdiagnosed BWS among ‘non-syndromic’ obese children.Method: We studied 159 children (95 male...

Background: Wiedemann Steinert Syndrome (WSS) is characterized by distinctive facial features (hypertelorism, thick eyebrows, long philtrum, broad nasal bridge), growth retardation, and intellectual disability of varying degrees. Affected individuals are often born small for their gestational age and have generalized hypertrichosis. Some have growth hormone deficiency, usually partial with normal pituitary MRI. The disease is caused by autosomal dominant varia...

Introducción: Beckwith-Wiedemann syndrome (BWS) is a congenital disorder that includes features such as overgrowth, macroglossia, abdominal wall defects, neonatal hyperinsulinism, lateralized overgrowth and predisposition to embryonal tumors during infancy. BWS may be clinically diagnosed by a scoring system and genetic diagnosis is mainly focused to imprinting disorders on the 11p15.5 region. The presence of pathogenic inactivating variants on the mate...

Background: Wiedemann–Steiner syndrome (WSS) is a rare autosomal dominant disorder characterized with hypertrichosis cubiti, dysmorphic facial appearance (hypertelorism, thick eyebrows, and narrow palpebral fissures), psychomotor delay, and short stature. WSS is caused by a mutation in the KMT2A gene. The timing of secondary sexual characteristics in patients with WSS is not well known. To our knowledge, two patients (one boy and one girl) with W...

Background: Genomic imprinting is an epigenetic mechanism referring to the monoallelic silencing of genes according to their parental origin. Human chromosome 11p15.5 encompasses two imprinted domains (ICR1 and ICR2) playing an important role in controlling fetal and postnatal growth. Genetic (uniparental disomy or gain/loss of function mutations) or epigenetic alterations at the 11p15.5 imprinted region (loss or gain of DNA methylation) are associated with two clinical disord...

Objective: Beckwith-Wiedemann syndrome (BWS) is a genetic disorder that results from abnormal expression of function of imprinting genes. Clinical manifestations vary greatly. To study the molecular genetic mechanism of BWS by Methylation Specific Multiplex Ligation-dependent Probe Amplification (MS-MPLA) and to analyze the relationship between genotype and phenotype, that will be helpful to improve the understanding of this disease.Methods: The copy num...

Background: Stüve-Wiedemann syndrome (SWS) is a rare autosomal recessive disorder, due to mutations in the leukemia inhibitory factor receptor (LIFR) gene. It is characterized by bowed-long bones, joint restrictions, dysautonomia, respiratory and feeding difficulties leading to death during infancy. In SWS survivors beyond 2 years of age, orthopedic problems are the main concern e.g. spinal deformations, osteoporosis and recurrent spontaneous fra...