presentation of dna methyltransferase 3 beta mutation with immune deficiency and dilation of aorta and esophagus

Background: immunodeficiency, centromeric region instability, and facial anomalies syndrome (icf) is a rare autosomal recessive disorder with centromeric instability as a hallmark.method: in this case report, we describe an iranian 6-year-old male who was diagnosed with icf syndrome. he had a history of recurrent infections, hydrocephalus report in pregnancy, failure to thrive, facial anomalies, global developmental delay, and umbilical hernia.results: the investigation showed esophageal dilatation in barium swallow, ascending aortic dilatation in echocardiography and cutis laxa in skin biopsy. in laboratory data, impaired antibody function was observed. finally, to find the probable causative genetic variant, a whole exome sequencing was performed. the data analysis using bioinformatics tools revealed c.1592g>a mutation in the exon 15 of dnmt3b. with respect to the diagnosis of icf syndrome, our patient was treated with intravenous immunoglobulin (ivig).conclusion: it is necessary to perform periodic neurologic and ophthalmologic examinations. echocardiography must be done annually. in addition, the possibility of hsct should be evaluated