title: Mixed gonadal dysgenesis with 45,X/46,X,idic(Y)/46,XY,idic(Y) karyotype.
abstract: To present the new karyotype with mixed gonadal dysgenesis, the aetiologic approach and difficulties in genetic counseling in mosaic sex chromosome disorders. We report a fourteen-year-old boy presented with slightly ambigious genitalia. Cytogenetic and fluorescence in situ hybridization investigations were carried out on his peripheral lymphocytes. As a result, three cell lines, 45,X, 46,X,idic(Y)(q11.2) and 46, XY were observed. A markedly higher percentage of Y-containing cells was observed in the blood (68%), which was not considered to be the major reason why the case did not have distinct ambiguous genitalia. We suggest that study of cytogenetic and molecular mosaicism involving sex chromosomes may help to further unravel the mysterious process in mixed gonadal dysgeneic patients.
authors: Kayseri Education and Research Hospital, Department of Medical Genetics, Kayseri, Turkey. aocaglayan@erciyes.edu.tr
authors: A O
authors: AO
authors: Caglayan
authors: F
authors: F
authors: Demiryilmaz
authors: M
authors: M
authors: Kendirci
authors: I
authors: I
authors: Ozyazgan
authors: H
authors: H
authors: Akalin
authors: S
authors: S
authors: Bittmann
mesh_terms: D000293:Adolescent; D002871:Chromosome Banding; D041322:Chromosomes, Human, Y / Q000235:genetics*; D012734:Disorders of Sex Development / Q000175:diagnosis / Q000235:genetics; D006061:Gonadal Dysgenesis, 46,XY / Q000175:diagnosis / Q000235:genetics; D006060:Gonadal Dysgenesis, Mixed / Q000175:diagnosis / Q000235:genetics*; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D008297:Male; D009030:Mosaicism; D012729:Sex Chromosome Aberrations; D051876:Sex-Determining Region Y Protein / Q000235:genetics*; D014424:Turner Syndrome / Q000175:diagnosis / Q000235:genetics
chemical_list: C497745:SRY protein, human; D051876:Sex-Determining Region Y Protein