Abstract
Inv dup(15) is a clinically significant bisatellited derivative of chromosome 15. Five unrelated patients with this abnormality are described and compared with ten confirmed and nine suspected cases in the literature. Mental and developmental retardation, hypotonia, behavioral disturbances, seizures, abnormal dermatoglyphics, and mild somatic anomalies were the most consistent findings. The extra chromosomes in our patients were identified with the aid of various techniques, including distamycin A/DAPI banding. A comparison of satellite polymorphisms suggested that the rearrangements frequently arose by meiotic nonsister chromatid exchange and second-division nondisjunction. A maternal origin was indicated in two cases, and parental ages were distinctly elevated.
MeSH Terms
Abnormalities, Multiple/genetics
Adolescent
Adult
Child
Chromosome Aberrations/genetics
Chromosome Disorders
Chromosomes, Human, 13-15
Female
Humans
Infant
Infant, Newborn
Intellectual Disability/genetics
Karyotyping
Male
Middle Aged
Pedigree
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Wisniewski L
Hassold T
Heffelfinger J
Higgins J V
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