ESPE Abstracts

Background: The diagnosis of 46,XY disorder of sex development (DSD) due to 5-alpha reductase 2 (5α-RD2) deficiency has been based on testosterone:dihydrotestosterone (T:DHT) ratio, urinary steroid profiling and mutational analysis of SRD5A2 gene. The biochemical hallmarks of 5α-RD2 deficiency include increased T:DHT ratio. However, several difficulties are observed in the DHT measurement leading to misdiagnosis. The mutational analysis of the SRD5A2 has been propose...

Background: Anti-Mullerian Hormone (AMH) is becoming a useful marker for ovarian function and prospective fertility. It is known to reflect ovarian reserve and response to ovarian stimulation in aided reproductive protocols. Levels are decreased in adults with chronic medical conditions such as Crohn’s disease and Turner’s Syndrome and in survivors of childhood cancers. AMH levels are increased in polyscystic ovarian syndrome as a reflection of increased numbers of a...

Background: In children undergoing investigation of testicular function the relationship between serum anti-Mullerian hormone (AMH) and the testosterone response to hCG stimulation test (HST) is unclear.Method: 75 children (3F, 72M) with a median age of 1.08 years (range, 0.003, 14.3) were investigated for suspected DSD by AMH on D1 and testosterone on D1 and D4, before and after 3-day HST. Of these children, 27 had an additional prolonged HST. Normal te...

The CYP19A1 gene product cP450aromatase enzyme is responsible for estrogen synthesis and androgen/estrogen equilibrium in many tissues; placenta and gonads are being the leading tissues. cP450aromatase deficiency has important effects on clinical phenotype due to excessive amount of androgen accumulation and insufficient estrogen synthesis in the pre- and postnatal periods. We identified a new point mutation in the CYP19A1 gene causing aromatase deficiency in three Turkish fam...

Background: Ovotesticular disorder of sex development (DSD) is characterized by the presence of both testicular and ovarian tissue in the gonads of an individual. Selective gonadal surgery is usually performed in infancy.Objective and hypotheses: Little is known about the long-term outcome of conservative gonadal surgery in ovotesticular DSD. We present our experience in a 46,XX girl diagnosed in the neonatal period.Method: The pat...

Background: The isodicentric Y (idic Y) is one of the most common aberrations of the Y chromosome. Most patients (pts) are chromosomal mosaics, including 45,X cell line.Objective and hypotheses: Our aim is to describe clinical and molecular features of our 45,X/46,Xidic(Y) cases.Method: We retrospectively evaluate the clinical description of nine cases (six females, one male, two with ambiguous genitalia) with mosaic karyotype 45,X...

Background: Steroid 5α-reductase catalyzes the conversion of testosterone into the more active androgen, dihydrotestosterone (DHT). In 46, XY patients with recessive mutations in steroid 5α-reductase type 2 enzyme (SRD5A2) gene, the degree of ambiguity ranges from isolated hypospadias to severe undermasculinization. SRD5A2 gene is located on chromosome 2 (p23 region) and is comprised of five exons and four introns.Objective and hypotheses: Mult...

Background: Rare-disease registries are considered to be the key for improving patient care through research and audit. In the field of paediatric endocrinology, the views of parents and affected young people about such registries are unclear.Objective: To conduct a survey to understand the views of parents and young people with rare conditions.Method: A structured questionnaire was completed by two groups of clinic attendees, thos...

Introduction: Down syndrome (DS) is a common condition and its association with disorders of sex development (DSD) is quite rare.Case report: We report four DS patients with DSD. Patient 1: 22 days old, undefined sex. 2.5 cm phallus, non-palpable gonads, and perineal urethra. Testosterone=332 ng/dl (at 1 mo), uterus on ultrasound, 47,XY +21 karyotype. A gonadoblastoma on the left gonad and a streak on the right. Dx – DSD Mixed Gonadal Dysgenesis. Pa...

Background: 17β-Hydroxysteroid dehydrogenase type 3 (17β-HSD3) deficiency is a rare cause of 46,XY sex reversal due to a defect in conversion of androstenedione to testosterone. It is autosomal recessively inherited and caused by mutations in 17HSD3.Objective and hypotheses: To define clinical and laboratory characteristics of 17β-HSD3 deficiency during neonatal period.Method: An 8-day-old newborn with female externa...