Patau's syndrome and 13q21q translocation.

This paper reports the case of a one-day-old male child presenting the typical features of Patau's syndrome. The cytogenetic study by means of conventional techniques and GTG and QFQ banding techniques showed that the chromosomal pattern of the propositus was 46,XYq+,-21,+t(13q21q) 15ps+,22ps+, and that the nondisjunction that originated the translocation and trisomy had occurred in the mother.