hrp0082p2-d3-617 | Turner Syndrome | ESPE2014

Early Occurrence of Gonadoblastoma Found at Elective Gonadectomy in Turner Syndrome Mosaic for Y Chromosome

MacMahon J , Morrissey R , McDermott M , O'Sullivan M , Quinn F , Green A , Lynch S A , O'Connell S M

Background: Turner syndrome (TS) is one of the most common genetic disorders in females and occurs in phenotypic females who are missing all or part of one sex chromosome. While the most common mosaic forms of the disorder are 45,X/46,XX and 45,X/46,Xiq, mosaicism for cells containing Y chromosome material is well documented.Objective and hypotheses: Owing to increased risk of gonadoblastoma (GB), current recommendations are for elective gonadectomy foll...

hrp0082p2-d3-619 | Turner Syndrome | ESPE2014

A Child with Clinical and Cytogenetic Features of Male Edward Syndrome and Turner Syndrome with Bilateral Gonadoblastoma in Infancy

MacMahon J , Morrissey R , McDermott M , Quinn F , Green A , Lynch SM

Background: Mosaic Turner syndrome (TSM) commonly occurs in the form of 45,X/46,XX and 45,X/46,Xiq, although mosaicism including the presence of a Y chromosome has been well documented. It is associated with increased risk of gonadoblastoma (GB).Objective and hypotheses: To date, there are only six reported cases of TSM with a trisomy 18 karyotype, and only two of these were phenotypically female with 45,X, 47,XY+18 karyotype.Metho...

hrp0082p2-d1-512 | Pituitary | ESPE2014

Clinical Phenotype and Complications, Endocrinopathies and Neuroimaging Findings in a Case Series of Sod

Maris I , Howard C , Bogue C , Morrissey R , Gregory L C , O'Connell S M , Dattani M T , O'Riordan S M P

Background: Septo-optic dysplasia (SOD) is a highly heterogeneous condition with a variable phenotype, defined as two or more features of the classical triad: i) optic nerve hypoplasia, ii) midline brain defects, and iii) pituitary hormone abnormalities.Objective and hypotheses: To describe the clinical, endocrine, and neuroimaging features in eight children with SOD.Method: Eight (six males) consecutive patients, diagnosed with SO...