Duplication 2p and monosomy 8p in mosaicism: clinical, molecular cytogenetic and molecular markers of a unique case.
Rev Invest Clin
; 59(6): 444-8, 2007.
Article
en En
| MEDLINE
| ID: mdl-18402336
We report on a female patient, with a de novo mosaicism for a structural rearrangement producing trisomy 2p21-->pter and monosomy 8p21-pter. GTG bands and fluorescence in situ hybridization (FISH) in lymphocytes identified: mos 46,XX,der(8)(8qter-->8p21::p21::2p21-->pter),9qh +[52]/ 46,XX,9qh+[82]. Fibroblasts showed the same cell lines in 15 and 12 cells respectively. DNA profiling with fourteen autosomal STR markers, did not reveal a chimerism status in our patient. She did not present the classical phenotype described for trisomy 2p and for monosomy 8p probably due to approximately 60% of the patient's cells being normal. The abnormality probably arose in a very early stage of development during the first post-fertilization divisions with a non-sister chromatid exchange event between chromosomes 2 and 8 producing three cellular clones: a normal clone, one with trisomy 2p and monosomy 8p and a third with monosomy 2p and trisomy 8p. Only the first two cell lines were found in both lymphocytes and fibroblasts of hypopigmented skin; the third may have been lost or limited to other tissues.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Trastornos Psicomotores
/
Trisomía
/
Anomalías Múltiples
/
Cromosomas Humanos Par 2
/
Cromosomas Humanos Par 8
/
Trastornos de los Cromosomas
/
Monosomía
/
Mosaicismo
Tipo de estudio:
Prognostic_studies
Límite:
Child, preschool
/
Female
/
Humans
Idioma:
En
Revista:
Rev Invest Clin
Asunto de la revista:
MEDICINA
Año:
2007
Tipo del documento:
Article
Pais de publicación:
México