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Borgaonkar DS. Chromosomal Variation in Man: A Catalog of Chromosomal Variants and Anomalies: Online NLM Version [Internet]. Bethesda (MD): National Center for Biotechnology Information (US); 1975-.

Cover of Chromosomal Variation in Man

Chromosomal Variation in Man: A Catalog of Chromosomal Variants and Anomalies: Online NLM Version [Internet].

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18q200

18q20
  • Becker L E.: Comment. Am. J. Neuroradiol. 19:399, 1998. [PMC free article: PMC8338167] [PubMed: 9504507]
    Gabrielli O, Coppa G V, Carloni I, Salvolini U.: 18q- syndrome and white matter alterations. Am. J. Neuroradiol. 19:398, 1998. [PMC free article: PMC8338173] [PubMed: 9504506]
    Loevner L A, Overhauser J, Kamholz J.: Reply. Am. J. Neuroradiol. 19:398-399, 1998.
    Mahr R N, Moberg P J, Overhauser J, Strathdee G, Kamholz J, Loevner L A, Campbell H, Zackai E H, Reber M E, Mozley D P, Brown L, Turetsky B I, Shapiro R M.: Neuropsychiatry of 18q- syndrome. AJMG (Neuropsych. Genet.) 67:172-178, 1996. [PubMed: 8723044]
    Basically the authors found no consistant relationship between the size of deleted segment and any characteristic previously reported in case studies.
    Aberration: Terminal deletion
    Chromosomal Aneuploidy: 18q-
    No band
  • Borgaonkar D S, Bias W B, Scott C I, Wadia R S, Borkowf S P: IgA and abnormal chromosome 18. Lancet 1:206-207, 1969. [PubMed: 4178450]
    Borkowf S P, Wadia R P, Borgaonkar D S, Bias W B: Partial deletion of the long arm of a chromosome 18. BD-OAS V(No. 5):155-159, 1969.
    46,XX,del(18)(q21).&46,XX,del(18)(pter -> q2:).
    Aberration: Terminal deletion
    MIM#: 601808
    No band
  • Cody J D, Carter E M, Sebold C, Heard P L, Hale D E.: A gene dosage map of chromosome 18: a map with clinical utility. Genet. in Med. 11: 778-782, 2009. [PubMed: 19745747]
    Cody J D, Ghidoni P D, DuPont B R, Hale D E, Hilsenbeck S G, Stratton R F, Hoffman D S, Muller S, Schaub R L, Leach R J, Kaye C I.: Congenital anomalies and anthropometry of 42 individuals with deletions of chromosome 18q. AJMG 85:455-462, 1999. [PubMed: 10405442]
    Cody J D, Heard P L, Crandall A C, Carter E M, Li J, Hardies J, Lancaster J, Perry B, Startton R F, Sebold C, Schaub R L, Soileau B, Hill A, Hasi M, Fox P T, Hale D E.: Narrowing critical regions and determing penetrance for selected 18q- phenotypes. AJMG Part A: 149A: 1421-1430, 2009. [PMC free article: PMC5325704] [PubMed: 19533771]
    Cody J D, Pierce J F, Brkanac Z, Plaetke R, Ghidoni P D, Kaye C I, Leach R J.: Preferential loss of the paternal alleles in the 18q- syndrome. AJMG 69:280-286, 1997. [PubMed: 9096757]
    Gay C T, Hardies L J, Rauch R A, Lancaster J L, Plaetke R, DuPont B R, Cody J D, Cornell J E, Herndon R C, Ghidoni P D, Schiff J M, Kaye C I, Leach R J, Fox P T.: Magnetic resonance imaging demonstrates incomplete myelination in 18q- syndrome: evidence for myelin basic protein haploinsufficiency. AJMG (Neuropsychiat. Genet.) 74:422-431, 1997. [PubMed: 9259379]
    Ghidoni P D, Hale D E, Cody J D, Gay C T, Thompson N M, McClure E B, Danney M M, Leach R J, Kaye C I.: Growth hormone deficiency associated in the 18q deletion syndrome. AJMG 69:7-12, 1997. [PubMed: 9066876]
    5 patients were evaluated for growth hormone deficiency and it is postulated that gene(s) on 18q may be involved.

    Wang Z, Cody J D, Leach R J, O''Connell P.: Gene expression patterns in cell lines from patients with 18q- syndrome. Hum. Genet. 104:467-475, 1999. [PubMed: 10453734]
    In the 1997 study, 34 patients were studied. 85% of the de novo deletions in 34 individuals were found to be paternal in origin.
    29 patients and 12 controls were studied.
    MRI demonstrated abnormal brain white matter in all patients.
    Aberration: Terminal deletion
    MIM#: 601808
    Chromosomal Aneuploidy: 18q-
    Index Terms: Growth hormone deficiency
    No band
  • Faulkner K W, Holmes L B, Steinfeld A, Abroms I F: A child with 18q- syndrome and cerebellar astrocytoma. J. Ped. 103:600-602, 1983. [PubMed: 6620023]
    Strathdee G, Zackai E H, Shapiro R, Kamholz J, Overhauser J.: Analysis of clinical variation seen in patients with 18q terminal deletions. AJMG 59:476-483, 1995. [PubMed: 8585568]
    26 patients in all were analyzed.
    46,XY,del(18)(q2:).&Parental karyotypes were normal.
    Aberration: Terminal deletion
    MIM#: 137800
    Index Terms: Astrocytoma ... cerebellar
    No band
  • O''Donnell L, Soileau B, Heard P, Carter E, Sebold C, Gelfond J, hale D E, Cody J D.: Genetic determinants of autism in individuals with deletions of 18q. Hum. Genet. 128: 155-164, 2010. [PubMed: 20499253]
    Aberration: TD,ID
    Chromosomal Aneuploidy: 18q-
    Index Terms: Autis(m)(tic),,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
  • Rosati E, Latini G, De Mitri B, Quartulli L, Caliandro P.: 18q- syndrome with congenital laryngeal stridor: case report. Riv. Ital. Pediat. 20:265-268, 1994.
    Patient P.D.
    46,XY,del(18)(q2:).
    The infant had MCA including flat facial profile with prominent anthelix and antitragus, midfacial hypoplasia, carp-shaped mouth and seborroic dermatitis.
    Aberration: Terminal deletion
    Chromosomal Aneuploidy: 18q-
    Index Terms: Stridor, congenital laryngeal
    No band
  • Silverman G A, Schneider S S, Massa H F, Flint A, Lalande M, Leonard J C, Overhauser J, van den Engh G, Trask B J.: The 18q- syndrome: analysis of chromosomes by bivariate flow karyotyping and the PCR reveals a successive set of deletion breakpoints within 18q21.2-q22.2. AJHG 56:926-937, 1995. [PMC free article: PMC1801205] [PubMed: 7717403]
    17 patients were studied.
    del(18)(q21.2:) 5 patients; del(18)(q21.3) 6 patients; del(18)(q22.1) 5 patients.
    A deletion of q22.2->qter seems to be more representative of the critical region.
    Aberration: Terminal deletion
    Chromosomal Aneuploidy: 18q-
    No band
  • Wyandt H E, Hecht F, Lovrien E, Stewart R E: Study of a patient with apparent monosomy 21 owing to translocation: 45,XX,21-,t(18q+). Cytogenetics 10:413-426, 1971. [PubMed: 5146418]
    45,XX,-18,-21,+t(18;21)(18pter->18q2::21q->21qter).,The patient had dyschondrosteosis and mild mental retardation.
    Aberration: Simple translocation
    No band
  • Wyandt H E, Vlietinck R F, Magenis R E, Hecht F: Colored reverse-banding of human chromosomes with acridine orange following alkaline-formalin treatment: densitometric validations and applications. Humangenetik 23:119-130, 1974. [PubMed: 4136600]
    Case No. 4 in this report.
    46,XY,t(18;20)(q2;q13).
    Aberration: Simple translocation
    No band
Copyright © 2011-2013, Digamber Borgaonkar.
Bookshelf ID: NBK105671

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