Goldenhar phenotype in a child with distal 22q11.2 deletion and intracranial atypical teratoid rhabdoid tumor

American Journal of Medical Genetics. Part a
Lucie Lafay-CousinFrancois P Bernier

Abstract

Chromosome-specific low copy repeats (LCRs) are implicated in several clinically significant microdeletion and microduplication syndromes. The well-recognized phenotype of DiGeorge/velocardiofacial syndrome (DG/VCF) results from deletions of the long arm of chromosome 22 (22q11.2) mediated by the proximal LCRs in this region. More recent evidence suggests that the distal LCRs within 22q11.2 are also implicated in microdeletions and microduplications with less characterized phenotypes. Here we report on an infant diagnosed with Goldenhar syndrome (GS) phenotype who developed an atypical teratoid rhabdoid tumor (AT/RT) of the brain due to a distal deletion of the chromosome 22q11.2 region encompassing the INI1/SMARCB1 tumor suppressor. We also discuss the phenotype of patients with germline deletions of this region and the possible implication of the 22q11.2 region in the GS.

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Citations

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22q11 Deletion Syndrome

22q11.2 deletion syndrome, also known as DiGeorge syndrome, is a congenital disorder caused by a partial deletion of chromosome 22. Symptoms include heart defects, poor immune system function, a cleft palate, complications related to low levels of calcium in the blood, and delayed development. Discover the latest research on this disease here.