title: Agenesis of the corpus callosum with mosaicism 46,XY/47,XY, extra ring chromosome.
abstract: A case of agenesis of the corpus callosum with a chromosomal abnormality is reported. The patient was a male infant, born to phenotypically normal, non-consanguineous parents. He had an abnormal phenotype, mental retardation, and chromosome mosaicism 46,XY/47,XY,+r. Chromosomal analysis of both parents showed a normal karotype. The origin of the small ring chromosome could not be determined and it is difficult to relate the phenotype of the infant to the cytogenetic findings.
mesh_terms: D061085:Agenesis of Corpus Callosum; D002869:Chromosome Aberrations; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000235:genetics; D007621:Karyotyping; D008297:Male; D009030:Mosaicism; D010641:Phenotype; D011596:Psychomotor Disorders / Q000235:genetics; D013577:Syndrome