XY gonadal dysgenesis and gonadoblastoma: a study in two sisters with a cryptic deletion of the Y chromosome involving the SRY gene.

Abstract

This paper reports a case of XY gonadal dysgenesis in two sisters. Both patients presented an eunochoid female phenotype with normal external genitalia. At laparotomy, the elder sister was found to have bilateral gonadoblastoma. Cytogenetic studies, which included G and C banding and in situ hybridization, showed that the patients had an apparently normal 46, XY karyotype. PCR analyses revealed absence of the conserved portion (HMG box) of the SRY gene and of the Y chromosome pseudoautosomal boundary region sequence in both patients. The presence of the ZFY sequence was detected by Southern hybridization in the two affected sisters. The patients' father (46, XY, no mosaicism detected in peripheral blood lymphocytes) was positive for SRY and ZFY sequences. The occurrence of gonadoblastoma is discussed in terms of the genetic factors that may lead to tumor development.

• Authors: A S Barbosa, T E Ferraz-Costa, M Semer, B Liberman, C A Moreira-Filho
• Journal: Human genetics (Hum Genet) Vol. 95 Issue 1 Pg. 63-6 (Jan 1995) ISSN: 0340-6717 [Print] Germany
• PMID: 7814028 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• DNA Primers
• DNA-Binding Proteins
• Nuclear Proteins
• SRY protein, human
• Sex-Determining Region Y Protein
• Transcription Factors

Topics

• Adolescent
• Adult
• Base Sequence
• Chromosome Deletion
• DNA Primers
• DNA-Binding Proteins (genetics)
• Female
• Gonadal Dysgenesis, 46,XY (complications, genetics)
• Gonadoblastoma (complications, genetics)
• Humans
• Molecular Sequence Data
• Nuclear Proteins
• Ovarian Neoplasms (complications, genetics)
• Sex-Determining Region Y Protein
• Transcription Factors
• Y Chromosome