Patterns and significance of abnormal karyotypes were discussed, and they showed great variations from one hypospadias to another, and no defenite aetiological correlations could be established.

• 有76位尿道下裂患者另外含有其他身体上的异常，主要包括隐睪症，疝气，阴囊分裂，以及性别不明等。