De novo 13q12.3-q14.11 deletion involvingBRCA2gene in a patient with developmental delay, elevated IgM levels, transient ataxia, and cerebellar hypoplasia, mimicking an A-T like phenotype

De novo 13q12.3-q14.11 deletion involvingBRCA2gene in a patient with developmental delay, elevated IgM levels, transient ataxia, and cerebellar hypoplasia, mimicking an A-T like phenotype