IDENTIFICATION OF AN UNBALANCED CRYPTIC TRANSLOCATION T(9-17)(Q34.3-P13.3) IN A CHILD WITH DYSMORPHIC FEATURES

被引:11
作者
ESTOP, AM
MOWERYRUSHTON, PA
CIEPLY, KM
KOCHMAR, SJ
SHERER, CR
CLEMENS, M
SURTI, U
MCPHERSON, E
机构
[1] HAHNEMANN UNIV,PITTSBURGH,PA
[2] MED COLL PENN,PITTSBURGH,PA 15212
[3] UNIV PITTSBURGH,GRAD SCH PUBL HLTH,DEPT HUMAN GENET,PITTSBURGH,PA 15261
[4] MAGEE WOMENS HOSP,DEPT GENET,PITTSBURGH,PA
[5] UNIV PITTSBURGH,SCH MED,DEPT PATHOL,PITTSBURGH,PA
关键词
D O I
10.1136/jmg.32.10.819
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
We report a case of an unbalanced cryptic telomeric translocation 46,XY,der(17),t(9;17)(q34.3;p13.3) in a boy with dysmorphic features and developmental delay. The proband had intrauterine growth retardation, postnatal short stature, and mild microcephaly. Magnetic resonance imaging showed incomplete myelination, but no evidence of lissencephaly. Cytogenetic analysis of the proband's peripheral blood showed an abnormal 17p. Fluorescence in situ hybridisation (FISH) with a Miller-Dieker cosmid probe did not detect a deletion for that area. Further analysis with a 17p telomere specific probe identified an unbalanced telomeric translocation. The same probe was used to determine the presence of an apparent balanced translocation t(9;17)(q34.3;p13.3) in the mother of the proband. The balanced translocation was confirmed with two cosmids that map distally on 9q34.3. Two phenotypically normal half sibs, a maternal aunt, a maternal uncle, and the maternal grandmother were found to be balanced translocation carriers as well. A subtle translocation is one mechanism that can produce an abnormal phenotype in a patient who had normal karyotype at lower band resolution levels.
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页码:819 / 822
页数:4
相关论文
共 22 条
[21]   THE PHENOTYPIC AND CYTOGENETIC SPECTRUM OF PARTIAL TRISOMY-9 [J].
WILSON, GN ;
RAJ, A ;
BAKER, D .
AMERICAN JOURNAL OF MEDICAL GENETICS, 1985, 20 (02) :277-282
[22]  
ZHU H, 1993, APP CYTOGENET, V19, P33