ESPE Abstracts

Background: DMXL2 haploinsufficiency in humans was recently shown to cause the polyendocrine-polyneuropathia syndrome including a GnRH deficiency (OMIM #616113). The neuronal deletion of Dmxl2 in mice (Nes::Cre;Dmxl2loxp/wt) caused infertility and gonadotropic deficiency (Plos Biology 9 e1001952, 2014). Dmxl2 encodes rabconnectin-3α (rbcn-3α), which participates in the control of the V-ATPase activity an...

Disorders of sex development (DSD) have defined as congenital conditions in which the development of chromosomal, gonadal, or anatomical sex is atypical. Wilms tumor 1(WT1) gene mutations have been described in 46,XY patients with ambiguous genitalia or complete gonadal dysgenesis with or without Wilms tumor, nephropathy, gonadoblastoma and other defects e.g. cryptorchidism, hypospadias. Sex chromosome mosaicism is a major cause of DSD with a wide phenotypic variability. The p...

Objective: Noonan syndrome; is an autosomal dominant genetic disorder characterized by short stature, low hair line, webbed neck, cubitus valgus, chest wall deformities and congenital heart defects. Here; the patient was admitted to hospital by parents due to undescended testis and finally infant and mother were diagnosed Noonan syndrome.Case: A 14-month-old male patient was admitted to hospital because of bilateral undescended testis. On physical examin...

Background: Gordon Holmes syndrome (GHS) is characterized by cerebellar ataxia/atrophy and normosmic hypogonadotropic hypogonadism (nHH). The underlying pathophysiology of this combined neurodegeneration and nHH remains unknown.Patients and methods: We studied a cohort of multiplex families with GHS through autozygosity mapping and whole exome sequencing.Results: We identified patients from three independent families carrying loss-...

Background: In pediatric patients multiple pituitary hormone deficiency (MPHD) can be caused by mutations in pituitary-specific transcription factors. Among those, mutations in PROP1 gene account for ~50% of genetically determined cases of CPHD. Regarding morphology, the anterior pituitary can be normal, hypo-/aplastic or enlarged.Results: We present two unrelated patients referred for evaluation of growth retardation. Both had profound growth retardatio...

Objective: The first line of treatment for Cushing`s disease (CD) is transsphenoidal surgery (TSS), whose effectiveness range is from 70 to 90%. If surgical treatment is unsuccessful or recurrence appears, radiation treatment (RT) is the next therapeutic option, which effectiveness range is also 90%, but the hypopituitarism rate as side effect of treatment is higher.Aim: Analysis of recurrence rates of CD and side ...

Introduction: The insulin-like growth factor 1 receptor (IGF1R) gene, located on chromosome 15q26.3, encodes the 1367 aa tyrosine kinase receptor IGF1R which is involved in many processes, including growth. Few heterozygous mutations and deletions of IGF1R leading to IGF-I resistance have been described in patients with intrauterine and postnatal growth retardation, microcephaly and variable learning difficulties. We report a not yet previous...

Introduction: Pathogenetic mutations in the HSD17B3, located on chromosome 9q22, lead to 17β-hydroxysteroid dehydrogenase type 3 (17β-HSD3) isoenzyme deficiency, etiopathogenetic for a disorder of sex development (DSD) with 46 XY karyotype and female phenotype at birth. 17β-HSD3 isoenzyme, expressed at testicular tissue, catalyzes the synthesis of testosterone from Δ4-androstenedione, allowing the correct development of male external genit...

Background: Virilization at puberty in girls remains a challenge. Several differential diagnoses must be considered including disorders of sex development (DSD) and tumors.Case Report: We report an 11.5-year-old girl who was referred to our center for progressive cliteromegaly since 6 months. Past medical history was remarkable for prematurity of 36 weeks gestation and for mild ongoing psychomotor delay. At presentation ...

Background: Turner syndrome (TS) is caused by a total or partial loss of one X chromosome. Typical features include short stature and primary amenorrhoea. In addition, decreasing trabecular bone mineral density (BMD) and increasing cortical BMD during puberty has been reported at the radius. As chromosomal aberration remains a probable cause of bone changes in TS, we aimed to elucidate whether the karyotype differs among the tissues originating from the three ...