ESPE Abstracts

Background: Pheochromocytoma is an uncommon tumor, producer of Catecholamines and causing hypertension in childhood. It is associated to genetic alterations, generally related with RET gene disorders.Method: We present the case of a unilateral familial isolated pheochromocytoma, present in father and son, carriers of a heterozygous mutation in the VHL gene (c.235C > G; p.R79G).Case: Male, 9 years-old with history of fever, prof...

Background: Maturity-Onset Diabetes of the Young (MODY) is a rare monogenic form of diabetes that result in β-cell dysfunction. MODY accounts for 2–5% of all diabetes cases. We presented here a family with MODY2 caused by a novel heterozygous p.L164I (c.490 C>A) mutation of the GCK gene.Case: A 15,5-year-old girl was admitted to our department because of fasting hyperglycemia. She had no polyuria, polydipsia and weight loss...

Background: Monostotic Fibrous Dysplasia (MFD) is thought to be caused by somatic mosaic activating mutations in GNAS. However, previous GNAS mutation analyses of MFD patients using direct sequencing of bone samples detected activating GNAS mutations only in 21 of 40 cases (52.5%) (Hum Pathol 2012; 43: 1234). We reported that next generation sequencing (NGS) detected somatic activating GNAS mutations sensitively from peripheral bloo...

Background: N-acetylneuraminic acid synthetase-congenital disorder of glycosylation (NANS-CDG) is a recently established rare autosomal recessive disease caused by pathogenic variants in NANS involved in the biosynthesis of N-acetylneuraminic acid (the most common member of sialic acids). Sialic acids are ubiquitously distributed in the body including the brain and skeletal system, and are required for the development and function of multiple organs/tissues. C...

Background: The Xp21 contiguous gen deletion syndrome is a rare disorder which is characterized by complex glycerol kinase deficiency, congenital adrenal hypoplasia, intellectual disability and Duchenne muscular dystrophy. It is caused by partial deletion of Xp 21. On Xp21 several genes are located contiguously, such as NR0B1/DAX1, dystrofin gen and gene for glycerol kinase, and the clinical features depend on the size of the deletion. The major clinical manif...

Introduction: The MODY diabetes (Maturity Onset Diabetes of the Young) belongs to monogenic alterations group, the mutation of the gene HNF-1α is the most common and present an autosomal dominant inheritance that causes dysfunction of the Beta pancreatic cell and alteration in the reabsorption of glucose to renal level, with age of variable presentations, it often leads to a misdiagnosis as type 1 diabetes mellitus.Description of the clinical case: ...

Background: 16 year old female neonate presented with neonatal diabetes, congenital hypothyroidism and sepsis.Objective and hypotheses: To evaluate the neonate for a common cause of neonatal diabetes, congenital hypothyroidism and sepsis and to explore for the best modality of management, including a possible role for sulphonylureas.Method: The neonate born of 3rd degree consanguinity was admitted and started on insulin infusion an...

Introduction: Primary growth hormone (GH) insensitivity is an autosomal recessive pathology caused by molecular defects in the GH receptor gene. In Chile there are 3 reported patients.Clinical case: Female patient, newborn of 37 weeks, due to delivery, adequate for gestational age. Son of non-consanguineous parents. Hospitalized at 12 hours of life in the neonatology unit due to persistent tremors, jaundice and septic sy...

Introduction: Serum levels of insulin growth factor (IGF1) could be a good indicator of growth hormone (GH) sensitivity and potentially GH therapy responsiveness. Few studies analyzed IGF1 generation test as predictor factor of the growth response to GH treatment in children with growth hormone deficiency (GHD) but results were controversial.Objective: The aimof the study was to evaluate the IGF-I generation test (IGF-I ...

Background: Deletions of distal chromosome 9p24 are often associated with 46,XY gonadal dysgenesis and, depending on the extent of the deletion, the monosomy 9p syndrome. The phenotype shows variable expressivity and is related to the size of the deletion. XY sex reversal is a relatively rare type of DSD (disorder of sexual development). Terminal region of short arm chromosome 9p (9p24.3 region) contains 3 types of DMRT genes (DMRT1-3). DMRT1 gen acts in syner...