Combined 22q11.1-q11.21 deletion with 15q11.2-q13.3 duplication identified by array-CGH in a 6 years old XXXX .

@entity1 @entity154 @entity851 @entity245 @entity2438 @entity2418
BACKGROUND: Deletions of chromosome 22q11 are present in over 90% of cases of @entity2418 ( @entity2418 / @entity2418 ). 15q11-q13 duplication is another recognized syndrome due to rearrangements of several genes, belonging to the category of imprinted genes. The phenotype of this syndrome varies but has been clearly associated with @entity245 and @entity2438 . Co-existence of the two syndromes has not been reported so far. RESULTS: Here we report a 6-year-old @entity1 presenting @entity851 , @entity154 and who exhibited learning difficulties. Fluorescence in situ hybridization (FISH) analysis of the proband revealed a deletion of @entity2418 critical region (TUPLE). Array-CGH analysis revealed an interstitial duplication of 12 Mb in size in the area 15q11.2-q13.3, combined with a 3.2 Mb deletion at region 22q11.1-q11.21. FISH analysis in the mother showed a cryptic balanced translocation between chromosome 15 and chromosome 22 (not evident by classic karyotyping). DISCUSION: The clinical manifestations could be related to both syndromes and the importance of array-CGH analysis in cases of unexplained @entity245 is emphasized. The present case further demonstrates how molecular cytogenetic techniques applied in the parents were necessary for the genetic counseling of the family.
