De novo X;Y translocation associated with imperforate anus and retinal pigmentary abnormalities.

Cytogenetically detectable translocations of Y chromosome material onto the distal short arm of an X chromosome are rare and result in a variable and poorly defined phenotype of short stature and short limbs occasionally associated with mental retardation. We report on a patient with a de novo 46,X,t(X;Y)(p22;q11) chromosome constitution who has additional features not previously described with this chromosome abnormality, including abnormal retinal pigmentation, imperforate anus, and hydronephrosis. Our patient extends the phenotype associated with X;Y translocations, raising new considerations for the clinical management and genetic counseling of such patients and their families.