An unusal case of hermaphroditism--a 46,XX/69,XXY chimera.

A diploid/triploid karyotype is an uncommon but important cause of true hermaphroditism and ambiguous genitalia. Individuals have a recognisable phenotype and characteristic hydatidiform placental changes. We report a 46,XX/69,XXY chimeric hermaphrodite. This case highlights the typical features (large placenta, intrauterine growth retardation, asymmetric growth, cranio-facial anomalies, syndactyly and pigmentary dysplasia). It illustrates the importance of obtaining skin and gonadal karyotypes in the case of genital ambiguity, as the venous lymphocytic karyotype is usually diploid.