title: Constitutional tetrasomy 18p.
abstract: We present here the first case of constitutional tetrasomy 18p from India. A 3 year old female with developmental delay and dysmorphic features revealed 47,XX,+mar karyotype. The small meta-centric marker chromosome was identified as i(18p) with m-FISH followed by m-BAND. Parents and a normal sibling of the proband revealed normal karyotype. There was history of mental retardation and dysmorphic features in four cases on paternal side; however, their karyotype was also normal.
authors.affiliation: Cell Biology Division, Department of Cancer Biology, The Gujarat Cancer and Research Institute, NCH Campus, Asarwa, Ahmedabad 380 016, India. gcriad1@sancharnet.in
authors.forename: S R
authors.initials: SR
authors.lastname: Bakshi
authors.forename: M M
authors.initials: MM
authors.lastname: Brahmbhatt
authors.forename: P J
authors.initials: PJ
authors.lastname: Trivedi
authors.forename: I
authors.initials: I
authors.lastname: Chudoba
mesh_terms: D000015:Abnormalities, Multiple; D002675:Child, Preschool; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D002887:Chromosomes, Human, Pair 18 / Q000235:genetics*; D002658:Developmental Disabilities / Q000235:genetics* / Q000473:pathology; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007223:Infant; D008607:Intellectual Disability / Q000235:genetics* / Q000473:pathology; D018404:Isochromosomes