Artigo de Periódico
Co-occurrence of achondroplasia and Down syndrome: genotype/phenotype association
Fecha
2010Registro en:
1542-0752
v. 88, n. 4
Autor
Moreira, Lilia Maria de Azevedo
Matos, Marcos A.
Schiper, Patricia P.
Carvalho, Acácia Fernandes Lacerda de
Gomes, Ivalda C.
Rolemberg, José C.
Lima, Renata Lúcia Leite Ferreira de
Toralles, Maria Betânia Pereira
Moreira, Lilia Maria de Azevedo
Matos, Marcos A.
Schiper, Patricia P.
Carvalho, Acácia Fernandes Lacerda de
Gomes, Ivalda C.
Rolemberg, José C.
Lima, Renata Lúcia Leite Ferreira de
Toralles, Maria Betânia Pereira
Institución
Resumen
BACKGROUND: This report describes the sixth case of an unusual association: Down syndrome with achondroplasia. It also analyzes the effects of both of these disorders on patient phenotype.
METHODS: A male infant was evaluated for Down syndrome. His appearance also suggested a diagnosis of achondroplasia. The child was evaluated by physical examination, radiography, cytogenetic study, and mutation analysis.
RESULTS: Chromosome analysis showed a karyotype of 47,XY,+21 in all 30 cells analyzed. Radiographic examination showed typical findings of achondroplasia, such as disproportionately large skull, shortening of limb segments, and lumbar lordosis. FGFR3 screening showed a heterozygous G1138A mutation.
CONCLUSIONS: The interaction of these two distinct genetic disorders in the same patient produces a phenotype typical of each syndrome with some overlapping signs. This case represents de novo origin of two disorders that both may be parental-age related. Birth Defects Research (Part A) 2010. © 2010 Wiley-Liss, Inc.