TY - JOUR
T1 - A t(5;16)(p15.32;q23.3) generating 16q23.3 → qter duplication and 5p15.32 → pter deletion in two siblings with mental retardation, dysmorphic features, and speech delay
AU - Hellani, Ali
AU - Mohamed, Sarar
AU - Al-Akoum, Siham
AU - Bosley, Thomas M.
AU - Abu-Amero, Khaled K.
PY - 2010/6
Y1 - 2010/6
N2 - We report on two siblings (half brothers on the paternal side) with a syndrome consisting of delayed development, cardiac anomalies, chest deformity, hip rotation, metatarsus adductus, genital hypoplasia, dysmorphic face, depressed nasal bridge, mental retardation, and speech delay. All metaphases examined showed a normal karyotype in the patients, their father, and both mothers. High-resolution arrayCGHexamination revealed a 16q (6 Mb) duplication dup(16)(16q23.3 → 16qter) and a 5p (0.97 Mb) terminal deletion del(5)(p15.32 → pter) in both affected boys but not their healthy siblings or parents. Interphase fluorescence in situ hybridization (FISH) confirmedboth the 16q duplicated region and the 5p terminal deletion. Clinical abnormalities in the patients included thin upper lip, clinodactyly, and foot deformity, which were reported previously with duplications in 16q23.3. Pectus excavatum, hip rotation, metatarsus adductus, umbilical hernia, brachycephaly, and esotropia were not reported previously in chromosome 16q duplications but may be features that occur intermittently. The 5p deleted region has been associated previously only with speech delay, which was present in both patients. These patients display certain phenotypic characteristics not reported previously in 16q duplication and confirm 5p terminal deletion as an important chromosome anomaly for speech delay.
AB - We report on two siblings (half brothers on the paternal side) with a syndrome consisting of delayed development, cardiac anomalies, chest deformity, hip rotation, metatarsus adductus, genital hypoplasia, dysmorphic face, depressed nasal bridge, mental retardation, and speech delay. All metaphases examined showed a normal karyotype in the patients, their father, and both mothers. High-resolution arrayCGHexamination revealed a 16q (6 Mb) duplication dup(16)(16q23.3 → 16qter) and a 5p (0.97 Mb) terminal deletion del(5)(p15.32 → pter) in both affected boys but not their healthy siblings or parents. Interphase fluorescence in situ hybridization (FISH) confirmedboth the 16q duplicated region and the 5p terminal deletion. Clinical abnormalities in the patients included thin upper lip, clinodactyly, and foot deformity, which were reported previously with duplications in 16q23.3. Pectus excavatum, hip rotation, metatarsus adductus, umbilical hernia, brachycephaly, and esotropia were not reported previously in chromosome 16q duplications but may be features that occur intermittently. The 5p deleted region has been associated previously only with speech delay, which was present in both patients. These patients display certain phenotypic characteristics not reported previously in 16q duplication and confirm 5p terminal deletion as an important chromosome anomaly for speech delay.
KW - 16q23.3 duplication
KW - 5p deletion
KW - Array CGH
KW - Mental retardation
KW - Speech delay
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U2 - 10.1002/ajmg.a.33400
DO - 10.1002/ajmg.a.33400
M3 - Article
C2 - 20503335
AN - SCOPUS:77952759104
SN - 1552-4825
VL - 152
SP - 1555
EP - 1560
JO - American Journal of Medical Genetics, Part A
JF - American Journal of Medical Genetics, Part A
IS - 6
ER -