hrp0095p1-311 | Growth and Syndromes | ESPE2022

Variability of the Noonan syndrome phenotypic spectrum in four patients carrying novel LZTR1 gene variants

Meneghin Alice , Mozzato Chiara , Trevisson Eva , Guazzarotti Laura

Noonan syndrome is a genetic condition caused by dysregulation of RAS-MAPK pathway (RASopathy) characterized by great clinical variability and genetic heterogeneity. Many genes has been associated with the disease, including recently LZTR1, which is causative of both dominant and recessive forms. Currently less than one hundred cases of Noonan syndrome has been associated with LZTR1 variants then phenotype related to this gene is poorly known. Here we describ...

hrp0097fc11.3 | GH and IGFs | ESPE2023

Analysis of a large panel of genes in a cohort of patients with severe short stature: detection rate and genotype-phenotype correlations

Guazzarotti Laura , Mozzato Chiara , Meneghin Alice , Nicolucci Antonio , Cassina Matteo

Short stature is a frequent reason for referral to pediatric endocrinologists and this phenotype has been associated with a large number of gene variations during the last decades, highlighting its complex and heterogeneous etiology. We evaluated the detection rate of the analysis of a selected gene panel in a cohort of patients with short stature defined as height below -2 standard deviations (SD). Overall, 134 patients were included in the study: 73 with GH deficiency (GHD),...

hrp0097p2-56 | Bone, Growth Plate and Mineral Metabolism | ESPE2023

Monogenic Diabetes (MODY) in Adolescents and Personalized Treatment.

Mozzato Chiara , Meneghin Alice , Monti Elena , Trevisson Eva , Guazzarotti Laura

Pathologically elevated serum levels of fibroblast growth factor-23 (FGF23), a bone-secreted hormone that regulates phosphorus homeostasis, result in renal phosphate wasting leading to rickets or osteomalacia. Patterns leading to FGF23 excess are still unknown. Recently, FGF23 elevated rickets has been associated with epidermal nevus syndrome, designating the cutaneous skeletal hypophosphatemia syndrome (CSHS). The clinical picture is not completely defined as, to date, only a...

hrp0097p2-174 | Bone, Growth Plate and Mineral Metabolism | ESPE2023

HIgh variability of phenotypic expression of the same genotype in X linked hypophosphatemic rickets (XLH)

Meneghin Alice , Mozzato Chiara , Monti Elena , Guazzarotti Laura

X-linked hypophosphataemia (XLH) is a dominant disorder caused by mutations in PHEX (located at Xp22.1), associated with rickets, lower limb deformities, pain, poor mineralization of the teeth and disproportionate short stature in children. The characteristics and severity of XLH vary between patients. Early diagnosis and specific treatment is usually decisive to improve short and long term patient outcomes. We describe the variability of phenotype in two sisters carrying the ...