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Topic: Chromosome 22, microdeletion 22 q11


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In the News (Sun 27 Dec 09)

  
  CMGS-Chromsome Abnormalities/17.12.98   (Site not responding. Last check: 2007-11-07)
The frequency of chromosomal disorders in early spontaneous abortions is 60%, whereas in late spontaneous abortions and stillbirths the frequency is 5%.
A chromosome number which is an exact multiple of the haploid number (23 as found in the gametes) and exceeds the diploid number is called polyploidy, and one which is not an exact multiple is called aneuploidy.
Usually arises from failure of paired chromosomes or sister chromatids to disjoin at anaphase (non-disjunction) or may be due to delayed movement of a chromosome at anaphase (anaphase lag).
www.ich.ucl.ac.uk /cmgs/chromabs.htm   (1386 words)

  
 Chromosomal inversion - Encyclopedia Glossary Meaning Explanation Chromosomal inversion   (Site not responding. Last check: 2007-11-07)
Chromosomal inversion - Encyclopedia Glossary Meaning Explanation Chromosomal inversion.
An inversion is a chromosome rearrangement in which a segment of a chromosome is reversed end to end.
The most common inversion seen in humans is on chromosome 9, at inv(9)(p11q12).
www.encyclopedia-glossary.com /en/Chromosomal-inversion.html   (248 words)

  
 Eastern Mediterranean Health Journal, Vol. 5 No. 6, Use of FISH technique in the diagnosis of chromosomal syndromes
Although routine chromosome analysis is very precise in diagnosing both numerical and structural chromosomal abnormalities, it is less sensitive in the diagnosis of patients with CMD.
Of the 4 patients with DGS, chromosome results were normal in 3, while in 1 DGS case, a deletion in chromosome 22 at band q11.2 was suspected.
Prevalence of 22q11 microdeletions in DiGeorge and velocardiofacial syndromes: implications for genetic counselling and prenatal diagnosis.
www.emro.who.int /Publications/EMHJ/0506/21.htm   (1776 words)

  
 Chromosome 22   (Site not responding. Last check: 2007-11-07)
He pointed out that human chromosome 22 is the shortest but most important and that is why he devoted his life to decipher and map the genes on this chromosome.
Annotation and chromosome-wide analysis of the human chromosome 22 was presented by Tim Hubbard of the Sanger Centre.
Chromosome 22 -- the first human chromosome to be fully sequenced -- appears on the foldout inside, spliced and diced by Neomorphic [www.neomorphic.com].
www.geneticsinfo.com /chromosomes/chromosome22   (908 words)

  
 FISH
Applications include identification of structurally abnormal chromosomes, including several of the cancer translocations, such as BCR/ABL and TEL/AML1 translocations; identification of marker chromosomes; detection of very small deletions (microdeletions); and rapid detection of Down syndrome and other numerical chromosome abnormalities; and the rapid detection of sex chromosomes and the SRY gene.
FISH is also utilized to confirm microdeletions identified during high resolution chromosome analysis and to aid in identification of abnormal chromosomes.
Aneuploid detection by FISH for chromosomes 13, 18, 21, X and Y may be indicated in situations where there is a risk of a numerical chromosome abnormality.
www.ggc.org /Diagnostics/Cytogenetics/fish.htm   (845 words)

  
 Iris coloboma and a microdeletion of chromosome 22: del(22)(q11.22) -- Morrison et al. 86 (11): 1316 -- British Journal ...
Iris coloboma and a microdeletion of chromosome 22: del(22)(q11.22) -- Morrison et al.
chromosome deletions are being recognised increasingly as a
of the microdeletion syndromes and is characterised by cardiac
bjo.bmjjournals.com /cgi/content/full/86/11/1316   (530 words)

  
 Chromosome 22 microdeletion 22 q11 - the free encyclopedia   (Site not responding. Last check: 2007-11-07)
Chromosome 22 microdeletion 22 q11 - the free encyclopedia
This article needs to becleaned up to conform to a higher standard of articlequality.
22 q11 microdeletion syndrome is a birth defect caused by agenetic abnormality that occurs in approximately one in 700 births.
www.world-knowledge-encyclopedia.com /?t=VCFS   (128 words)

  
 Laboratory for Medical Genetics Dr. Klein: Cytogenetics/Prenatal diagnostics   (Site not responding. Last check: 2007-11-07)
Balanced chromosome sets are usually void of clinical symptoms, but unbalanced karyotypes lead to chromasomal syndromes with the symptomatic triad of psychomotoric retardation, facial dysmorphias and malformation of the internal organs.
Robertsonian Translocation: Caused by a break in two acentric chromosomes (chromosomes 13, 14, 15, 21 and 22) in which the centromere region fuses the two centric fragments together and where the compensating acentric fragments are lost.
Indications for a chromosome analysis from blood lymphocytes are in particular, habitual miscarriages, infertility as well as chromosomal syndromes.
www.medizinische-genetik.de /lab/cytogen/cytofold.htm   (811 words)

  
 Partly Mapped Human Disease Genes
A narrow segment of maternal uniparental disomy of chromosome 7q31-qter in Silver-Russell Syndrome delimits a candidate gene region.
Two loci on chromosomes 2 and X for premature coronary heart disease identified in early- and late-settlement populations of Finland.
Herein we report the narrowing of the critical region for the acheiropodia gene and the subsequent identification of a common mutation in C7orf2-the human orthologue of the mouse Lmbr1 gene-that is responsible for the disease.
www.mad-cow.org /00/human_inherited.html   (5596 words)

  
 Catch-22 - TheBestLinks.com - Antinomy, Bombardier, Chromosome, Italy, ...   (Site not responding. Last check: 2007-11-07)
Catch 22 has become a term, inspired by the book of the same name, describing a general situation in which A must have been preceded by B, and B have must been preceded by A. Symbolically, (~B => ~A) and (~A => ~B) where either A or B must come into being first.
Catch 22 is a name (now considered derogatory) for Chromosome 22, microdeletion 22 q11; this disorder is located on the 22nd chromosome and the main symptoms form CATCH as an acronym:
Catch 22 is also a third-wave ska-punk band.
www.thebestlinks.com /Catch__MM__22.html   (715 words)

  
 Chromosome 22 Syndromes   (Site not responding. Last check: 2007-11-07)
Complete trisomy 22 happens when an extra (third) copy of chromosome 22 is present in every cell of the body...
Trisomy 22 mosaicism syndrome and Ullrich - Turner stigmata.
The children who are born with disorder (which is usually inherited from a carrier parent) have a marker chromosome, made up of the upper (p section) and part of the lower (q section) arms of chromosome 22, and a small portion of the lower (q section) arm of chromosome 11.
www.ibis-birthdefects.org /start/digeorge.htm   (3189 words)

  
 Chromosome 22 Central
The additional chromosome 22 usually arises spontaneously (de novo), though it has been reported to have been passed down in families, and some reports show the parents as mosaic for the marker chromosome but who show no phenotypic (outer) symptoms of the syndrome.
The first association of the common abnormalities common to CES was established over 100 years ago (1898) by Haab, and first described in association with a small marker chromosome in 1965 by Schachenmann.
22q11.2 is a very unstable region of chromosome 22, which is involved in other syndromes, such as 22q11 deletion (a microdeletion of that area of the chromosome) and supernumerary der(22) syndrome, also known as trisomy 22 or partial trisomy 11/22.
www.nt.net /~a815/cateye.htm   (520 words)

  
 VCFS and Prenatal Diagnosis   (Site not responding. Last check: 2007-11-07)
Washington, D.C. VCFS is caused by a microdeletion (small missing piece) of chromosome 22 at a region identified as the q11.2 band.
One of the methods is karyotyping, or chromosome analysis, which looks at the physical structure of the chromosomes.
If there is a deletion on one of the chromosome #22s, the probe will have nowhere to stick to, and only one probe appears.
www.vcfsef.org /AboutVCFS/Medical-GeneticIssues/Prenatal   (484 words)

  
 Frequent translocations occur between low copy repeats on chromosome 22q11.2 (LCR22s) and telomeric bands of partner ...
The breakpoint on chromosome 15 was between the C at 92581643 and the A at 92581644 (line).
The breakpoint on chromosome 22 was between the A at 25528665 and the A at 25528666 (line).
The partner chromosome probes shown in the images derive from clones that are specific to the unique sequences in the telomeric bands of specific chromosomes (color-coded).
hmg.oxfordjournals.org /cgi/content/full/12/15/1823   (7065 words)

  
 Genetic Disorders of Cardiac Morphogenesis : The DiGeorge and Velocardiofacial Syndromes -- Goldmuntz and Emanuel 80 ...
The control probe is used to identify the distal end of chromosome 22; the test probe is specific for the DGCR of chromosome 22.
The chromosome with the deletion is indicated by an arrow.
Microdeletions of chromosomal region 22q11 in patients with congenital conotruncal cardiac defects.
circres.ahajournals.org /cgi/content/full/80/4/437   (5379 words)

  
 Catch 22 -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-11-07)
A book by (United States novelist whose best known work was a fl comedy inspired by his experiences in the Air Force during World War II (1923-1999)) Joseph Heller, or the movie based on the book; see (Click link for more info and facts about Catch-22) Catch-22.
A type of (The branch of philosophy that analyzes inference) logical (A difficult problem) conundrum based on the book; see (Click link for more info and facts about Catch 22 (logic)) Catch 22 (logic).
A name for the (A disease or disorder that is inherited genetically) genetic disorder (Click link for more info and facts about Chromosome 22, microdeletion 22 q11) Chromosome 22, microdeletion 22 q11.
www.absoluteastronomy.com /encyclopedia/C/Ca/Catch_22.htm   (164 words)

  
 Cytogenetic Service - Posters - Liverpool Women's Hospital   (Site not responding. Last check: 2007-11-07)
The infant was bruised at birth and was noted to be thrombocytopaenic with decreased megakaryocytes and a platelet count of 7, with no evidence of any immunological cause for this.
Although chromosome analysis of the bone marrow did not reveal a Cytogenetically abnormal clone, nevertheless, this infant presented with and still remains persistently thrombocytopaenic, with decreased Megakaryocytes and a Platelet count of 7, which have not been attributed to a non-oncogenic cause.
Therefore, the dysmorphisms seen in this infant, could be attributed to the deletion of chromosomal material in the proximal region of chromosome 10q.
www.lwh.org.uk /clinical_services/genetics/cytogenetics/poster1.html   (768 words)

  
 DiGeorge syndrome   (Site not responding. Last check: 2007-11-07)
DiGeorge syndrome is also called Microdeletion 22q11 syndrome (del 22q11.2) and Velocardiofacial syndrome (VCF).
Therefore, the treatment is symptomatic, that is calcium is administered, infections are treated with antibiotics, and these patients may occasionally undergo cardiac surgery for their heart abnormalities.
The 22q11.2 deletion syndrome is diagnosed in individuals with a submicroscopic deletion of chromosome 22 detected by fluorescence in situ hybridization (FISH) using DNA probes from the DiGeorge chromosomal region (DGCR).
www.worldhistory.com /wiki/D/DiGeorge-syndrome.htm   (446 words)

  
 Highly Sensitive Fluorescence In Situ Hybridization Method to Detect Double BCR/ABL Fusion and Monitor Response to ...
one on the abnormal chromosome 9 and one on the Ph chromosome.
In metaphases with a masked Ph chromosome, we observed a BCR/ABL fusion signal at 22q11.2 on the abnormal chromosome 22, a
Specimen 22 from part I, had a D-FISH pattern that was consistent with an insertion of a portion of BCR into the ABL locus.
www.bloodjournal.org /cgi/content/full/91/9/3357   (6133 words)

  
 catch 22 information,catch 22   (Site not responding. Last check: 2007-11-07)
Captain Aardvaark is a character who giggles in serious situations and takes pleasure in others' pain and even rapes aprostitute named Michaela near the end of the book, whom he calls trash, and kills her so she won't tell anyone.
catch 22 is a term, inspired by the book of the same name, as a general situation where A requires B, and Brequires A, and so if both A and B are false, neither can ever be true.
catch 22 is a name (now considered derogatory) for Chromosome 22, microdeletion 22 q11 ; this disorder is located on the 22th chromosome and the main symptoms form CATCH as an acronym:
www.vsearchmedia.com /catch_22.html   (733 words)

  
 Complex and segmental uniparental disomy (UPD): review and lessons from rare chromosomal complements -- Kotzot 38 (8): ...
Maternal uniparental disomy of chromosome 14 confined to an interstitial segment (14q23-14q24.2).
Maternal uniparental isodisomy of chromosome 14 associated with a paternal t(13q14q) and precocious puberty.
Prenatal diagnosis of maternal uniparental disomy of chromosome 15 in association with de novo supernumerary marker chromosome 15.
jmg.bmjjournals.com /cgi/content/full/38/8/497   (6917 words)

  
 cacth 22 information,catch 22   (Site not responding. Last check: 2007-11-07)
All Occurences of 'catch 22' were replaced with 'cacth 22'.
cacth 22 is a term, inspired by the book of the same name, as a general situation where A requires B, and Brequires A, and so if both A and B are false, neither can ever be true.
cacth 22 is a name (now considered derogatory) for Chromosome 22, microdeletion 22 q11 ; this disorder is located on the 22th chromosome and the main symptoms form CATCH as an acronym:
www.vsearchmedia.com /cacth_22.html   (733 words)

  
 Wikinfo | Catch-22
Captain Aardvaark is a character who giggles in serious situations and takes pleasure in others' pain and even rapes a prostitute named Michaela near the end of the book, whom he calls trash, and kills her so she won't tell anyone.
In some cases, Hungry Joe for example, a character dies in a way another character does, which completely changes the point of some events.
Catch 22 is a term, inspired by the book of the same name, as a general situation where A requires B, and B requires A, and so if both A and B are false, neither can ever be true.
www.wikinfo.org /wiki.php?title=Catch-22   (721 words)

  
 Karger Publishers
De novo 9-break-event in one chromosome 21 combined with a microdeletion in 21q22.11 in a mentally retarded boy with short stature
We report on a moderately mentally retarded 12-year-old boy of short stature showing the most complex chromosomal rearrangement (CCR) within a single chromosome ever described.
A de novo derivative chromosome 21 was recognized in GTG-banding shortly after birth.
content.karger.com /ProdukteDB/produkte.asp?Aktion=ShowAbstract&ProduktNr=224037&Ausgabe=229905&ArtikelNr=76284&ContentOnly=false   (203 words)

  
 Two sibs with Wolf-Hirschhorn and DiGeorge deletions resulting from an unbalanced chromosome rearrangement, 45,XX/XY, ...
Two sibs with Wolf-Hirschhorn and DiGeorge deletions resulting from an unbalanced chromosome rearrangement, 45,XX/XY, der(4)t(4;22) (p16.3;q11.2) mat,-22 -- Reddy et al.
A mother with apparently balanced translocation between chromosomes 4 and
The mother was a slow learner and required special education.
jmg.bmjjournals.com /cgi/content/abstract/33/10/852   (286 words)

  
 VCFS - All About All   (Site not responding. Last check: 2007-11-07)
Chromosome 22, microdeletion 22 q11 (Redirected from VCFS)
This article needs to be cleaned up to conform to a higher standard of quality.
See How to Edit and Style and How-to for help, or this article's talk page.
www.answers-zone.com /article/VCFS   (188 words)

  
 Pathology Lecture Summary
Ð22 autosomes and 1 pair of sex chromosomes
n46,XX,t(9;22)(q34;q11.2) is a female karyotype with a translocation between chromosomes 9 at band q34 and chromosome 22 at band q11.2
nABL (Abelson) is a proto-oncogene encoding tyrosine kinase (signal transducer) on chromosome 9; BCR (breakpoint cluster region) is phosphoprotein on 22
www.uic.edu /depts/mcpt/curriculum/cyto1_vl_lecture.html   (1199 words)

  
 [No title]
Donlon TA: Similar molecular deletions on chromosome 15q11.2 are encountered in both the Prader-Willi and Angelman Syndromes.
Magenis RE, Donlon TA: Geimsa-11 heteromorphism of chromosome 1.
Donlon TA, Lalande M, Wyman A, Bruns G, Latt SA: Molecular diagnosis and analysis of chromosome #15 microdeletion and lability in the Prader-Willi syndrome.
www2.hawaii.edu /~donlon/Tims.cv.html   (2994 words)

  
 Prasad Koduru Ph.D.
Bialer, MG; Yenamandra, A; Klein, R; Koduru, P; Mehta, L."Ascertainment of chromosome 22q11.2 microdeletion in congenital heart defects [Abstract]".
Mehta, L; Yenamandra, A; Perrone, R; Koduru, P."De novo chromosomal insertion in a child with autism [Abstract]".
Bayer, R; Kolitz, JE; Allen, SL; Schulman, P; Brody, J; Koduru, P."Late appearance of the Philadelphia (Ph(1)) chromosome in Acute Lymphocytic Leukemia [Abstract]".
www.med.nyu.edu /pubs/kodurp01.html   (584 words)

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