Mixed gonadal dysgenesis with 45,X/46,X,idic(Y)/46,XY,idic(Y) karyotype. 2009

A O Caglayan, and F Demiryilmaz, and M Kendirci, and I Ozyazgan, and H Akalin, and S Bittmann
Kayseri Education and Research Hospital, Department of Medical Genetics, Kayseri, Turkey. aocaglayan@erciyes.edu.tr

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.

UI MeSH Term Description Entries
D007621 Karyotyping Mapping of the KARYOTYPE of a cell. Karyotype Analysis Methods,Analysis Method, Karyotype,Analysis Methods, Karyotype,Karyotype Analysis Method,Karyotypings,Method, Karyotype Analysis,Methods, Karyotype Analysis
D008297 Male Males
D009030 Mosaicism The occurrence in an individual of two or more cell populations of different chromosomal constitutions, derived from a single ZYGOTE, as opposed to CHIMERISM in which the different cell populations are derived from more than one zygote.
D002871 Chromosome Banding Staining of bands, or chromosome segments, allowing the precise identification of individual chromosomes or parts of chromosomes. Applications include the determination of chromosome rearrangements in malformation syndromes and cancer, the chemistry of chromosome segments, chromosome changes during evolution, and, in conjunction with cell hybridization studies, chromosome mapping. Banding, Chromosome,Bandings, Chromosome,Chromosome Bandings
D006060 Gonadal Dysgenesis, Mixed A type of defective gonadal development in patients with a wide spectrum of chromosomal mosaic variants. Their karyotypes are of partial sex chromosome monosomy resulting from an absence or an abnormal second sex chromosome (X or Y). Karyotypes include 45,X/46,XX; 45,X/46,XX/47,XXX; 46,XXp-; 45,X/46,XY; 45,X/47,XYY; 46,XYpi; etc. The spectrum of phenotypes may range from phenotypic female to phenotypic male including variations in gonads and internal and external genitalia, depending on the ratio in each gonad of 45,X primordial germ cells to those with normal 46,XX or 46,XY constitution. Mixed Gonadal Dysgenesis
D006061 Gonadal Dysgenesis, 46,XY Defects in the SEX DETERMINATION PROCESS in 46, XY individuals that result in abnormal gonadal development and deficiencies in TESTOSTERONE and subsequently ANTIMULLERIAN HORMONE or other factors required for normal male sex development. This leads to the development of female phenotypes (male to female sex reversal), normal to tall stature, and bilateral streak or dysgenic gonads which are susceptible to GONADAL TISSUE NEOPLASMS. An XY gonadal dysgenesis is associated with structural abnormalities on the Y CHROMOSOME, a mutation in the GENE, SRY, or a mutation in other autosomal genes that are involved in sex determination. Swyer Syndrome,46, XY Gonadal Dysgenesis,46, XY Gonadal Sex Reversal,46,XY Complete Gonadal Dysgenesis,Complete Gonadal Dysgenesis, 46, XY,Gonadal Dysgenesis, 46, XY,Pure Gonadal Dysgenesis 46,XY,Pure Gonadal Dysgenesis, 46, XY,Sex Reversal, Gonadal, 46, XY,XY Pure Gonadal Dysgenesis,Syndrome, Swyer
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D012729 Sex Chromosome Aberrations Abnormal number or structure of the SEX CHROMOSOMES. Some sex chromosome aberrations are associated with SEX CHROMOSOME DISORDERS and SEX CHROMOSOME DISORDERS OF SEX DEVELOPMENT. Sex Chromosome Abnormalities,Abnormalities, Sex Chromosome,Chromosome Abnormalities, Sex,Aberration, Sex Chromosome,Aberrations, Sex Chromosome,Abnormality, Sex Chromosome,Chromosome Aberration, Sex,Chromosome Aberrations, Sex,Chromosome Abnormality, Sex,Sex Chromosome Aberration,Sex Chromosome Abnormality
D012734 Disorders of Sex Development In gonochoristic organisms, congenital conditions in which development of chromosomal, gonadal, or anatomical sex is atypical. Effects from exposure to abnormal levels of GONADAL HORMONES in the maternal environment, or disruption of the function of those hormones by ENDOCRINE DISRUPTORS are included. Disorders of Sexual Development,Sex Development Disorders,Sex Differentiation Disorders,Ambiguous Genitalia,Genital Ambiguity,Hermaphroditism,Intersex Conditions,Intersexuality,Pseudohermaphroditism,Sexual Development Disorders,Sexual Differentiation Disorders,Ambiguities, Genital,Ambiguity, Genital,Condition, Intersex,Conditions, Intersex,Differentiation Disorder, Sex,Differentiation Disorder, Sexual,Differentiation Disorders, Sex,Differentiation Disorders, Sexual,Disorder, Sex Differentiation,Disorder, Sexual Differentiation,Disorders, Sex Differentiation,Disorders, Sexual Differentiation,Genital Ambiguities,Genitalia, Ambiguous,Intersex Condition,Intersexualities,Sex Development Disorder,Sex Differentiation Disorder,Sexual Development Disorder,Sexual Differentiation Disorder

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