title: Use of Y chromosome specific probes to detect low level sex chromosome mosaicism.
abstract: An individual found to be a true hermaphrodite at laparotomy, is presented. Cytogenetic studies which initially disclosed a 46,XX karyotype, conflicted with the anatomic presence of a testis. More extensive analysis of peripheral lymphocytes and skin fibroblasts revealed low level 46,XX/69,XXY mosaicism. DNA hybridization studies, using highly repeated Y chromosome specific probes, confirmed the rare presence of Y chromosome bearing cells. Such combined clinical and molecular studies can have an important impact on diagnosis and management of cases in which sex chromosome mosaicism is suspected.
mesh_terms: D002675:Child, Preschool; D012734:Disorders of Sex Development / Q000235:genetics*; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D009030:Mosaicism; D011123:Polyploidy; D014998:Y Chromosome