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The value of chromosome analysis in cases of neural tube defects: A case of anencephaly associated with fetal DUP(2) (p24→pter)
Author(s) -
Singer Niecee,
Gersen Steven,
Warburton Dorothy
Publication year - 1987
Publication title -
prenatal diagnosis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.956
H-Index - 97
eISSN - 1097-0223
pISSN - 0197-3851
DOI - 10.1002/pd.1970070807
Subject(s) - anencephaly , karyotype , fetus , neural tube , neural tube defect , gene duplication , biology , abnormality , chromosome , dup , chromosome analysis , anatomy , genetics , obstetrics , pregnancy , medicine , embryo , psychiatry , gene
A family is described in which two anencephalic fetuses were identified in two pregnancies. Autopsy revealed kidney anomalies in both fetuses. Chromosome analysis was performed only on the second fetus, which had a 46,XY,lOq+ karyotype. Parental chromosome analysis showed the maternal karyotype to be 46,XX,t(2;10) (p24;q26) thus demonstrating that the fetus was carrying a duplication 2(p24→pter). Recurrence risks for anencephaly based on the cytogenetic abnormality were much higher than those which would be quoted for isolated anencephaly. This points out the necessity for complete diagnostic studies when a fetus with a neural tube defect is identified. The literature in regard to the 2p duplication phenotype is reviewed. It is possible that the duplication of the distal segment of 2p results in a neural tube defect/kidney anomaly phenotype.