title: Identification of X monosomy cells from a gonad of mixed gonadal dysgenesis with a 46,XY karyotype: case report.
abstract: Mixed gonadal dysgenesis (MGD) is a disorder of sexual development that typically has a mosaic 45,X/46,XY karyotype. A 1-year-old infant with 46,XY identified by peripheral blood karyotype demonstrated clinical manifestations and gonadal pathologic features of MGD. Fluorescence in situ hybridization (FISH) for X and Y chromosomes and immunofluorescence for SRY along with testicular and ovarian lineage markers SOX9 and FOXL2, respectively, were performed on paraffin sections from the gonad to ascertain the somatic mosaic state for 45,X monosomy and 46,XY cells. The gonad consisted of cells with X and XY signals, which were further quantified in comparison with a normal control testis by a digital image analysis program. The average percentages of 45,X cells of this patient's gonad and a control testis were 39.0% and 5.7%, respectively (χ2 test, P < 0.001). SRY expression was absent in approximately 10% of precursor granulosa cells (FOXL2 positive) and precursor Sertoli/granulosa cells (both SOX9 and FOXL2 positive) within gonadoblastomas, confirming the involvement of 45,X cells. A combination of analysis of FISH and immunofluorescence for SRY in the gonadal tissue could identify 45,X cells in MGD with 46,XY.
authors: From the Molecular and Developmental Pathology Research Group (NN-U, RF); Division of Endocrinology and Metabolism (NN-U, YH); Department of Pathology and Laboratory Medicine, Tokyo Metropolitan Children's Medical Center, 2-8-29 Musashidai, Fuchu, Tokyo, Japan (RF); and Department of Pathology, Dunedin School of Medicine, University of Otago, P.O. Box 913, Dunedin, New Zealand (RF, IMM).
authors: Noriko
authors: N
authors: Nishina-Uchida
authors: Ryuji
authors: R
authors: Fukuzawa
authors: Yukihiro
authors: Y
authors: Hasegawa
authors: Ian M
authors: IM
authors: Morison
mesh_terms: D002872:Chromosome Deletion; D005260:Female; D005455:Fluorescent Antibody Technique; D000074842:Forkhead Box Protein L2; D051858:Forkhead Transcription Factors / Q000378:metabolism; D006060:Gonadal Dysgenesis, Mixed / Q000235:genetics* / Q000473:pathology; D006066:Gonads / Q000378:metabolism / Q000473:pathology; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007223:Infant; D059785:Karyotype; D008297:Male; D055758:SOX9 Transcription Factor / Q000378:metabolism; D051876:Sex-Determining Region Y Protein / Q000378:metabolism
chemical_list: C421604:FOXL2 protein, human; D000074842:Forkhead Box Protein L2; D051858:Forkhead Transcription Factors; D055758:SOX9 Transcription Factor; C527932:SOX9 protein, human; D051876:Sex-Determining Region Y Protein