[Partial trisomy 9q: description of a new case].

The authors describe one case of partial 9q trisomy they observed. The malformations they observed are correspondent to the very little amount of existing documented cases. And just because we have only a few observations, we thought useful publishing this case, to better define the clinical features among the alterations of chromosome 9 (trisomy 9 p and 9q). Head, neck, bones, heart and urogenital apparatus seen to be the most frequently involved in the phenotypic expression of the 9q trisomy.