title: Delineation of the interstitial 6q25 microdeletion syndrome: refinement of the critical causative region.
abstract: Interstitial deletions of the long arm of chromosome 6 are rare. Clinically, this is a recognizable microdeletion syndrome associated with intellectual disability (ID), acquired microcephaly, typical dysmorphic features, structural anomalies of the brain, and nonspecific multiple organ anomalies. Most of the reported cases have cytogenetically visible interstitial deletions or subtelomeric microdeletions. We report on a boy with global developmental delay, distinct dysmorphic features, dysgenesis of the corpus callosum, limb anomalies, and genital hypoplasia who has a small interstitial deletion of the long arm of chromosome 6 detected by comparative genomic hybridization (CGH). The deleted region spans around 1 Mb of DNA and contains only two coding genes, ARID1B and ZDHHC14. To the best of our knowledge, this case represents the typical phenotype with the smallest deletion reported so far. We discuss the possible role of these genes in the phenotypic manifestations.
authors.affiliation: Institute of Medical Genetics, Wolfson Medical Center, Holon, Jerusalem, Israel.
authors.forename: Marina
authors.initials: M
authors.lastname: Michelson
authors.forename: Anat
authors.initials: A
authors.lastname: Ben-Sasson
authors.forename: Chana
authors.initials: C
authors.lastname: Vinkler
authors.forename: Esther
authors.initials: E
authors.lastname: Leshinsky-Silver
authors.forename: Ifat
authors.initials: I
authors.lastname: Netzer
authors.forename: Ayala
authors.initials: A
authors.lastname: Frumkin
authors.forename: Sara
authors.initials: S
authors.lastname: Kivity
authors.forename: Tally
authors.initials: T
authors.lastname: Lerman-Sagie
authors.forename: Dorit
authors.initials: D
authors.lastname: Lev
mesh_terms: D000015:Abnormalities, Multiple / Q000175:diagnosis / Q000235:genetics*; D001921:Brain / Q000473:pathology; D002872:Chromosome Deletion; D002896:Chromosomes, Human, Pair 6; D055028:Comparative Genomic Hybridization; D019066:Facies; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007223:Infant; D008297:Male; D013577:Syndrome