ABSTRACT
The partial trisomy 4q is a strange chromosomal illness. This illness is caused by the duplication of a portion of chromosome 4. In most of the cases, it is the result of a balanced translocation in one of the progenitors. The "de novo" appearance is less common. We present a patient with a partial "de novo" duplication in the distal segment of the long arm of chromosome 4 (q31, q35), in association with Robertsonian translocation between chromosomes 14 and 21. This association has not been described previously. In the 4q duplication, the relationship between the phenotype and the parts of the duplicated segment is not well defined, although it seems clear that the renal anomalies and/or thumbs abnormalities are a characteristic manifestation. We have reviewed the literature and, of the cases previously described with trisomy q31-35, we came to the conclusion that this region of chromosome 4 may also be involved in constituting the "Syndrome of partial trisomy 4q" or Auriculo-acro-renal Syndrome".
Subject(s)
Chromosomes, Human, Pair 4/genetics , Fingers/abnormalities , Gene Duplication , Kidney/abnormalities , Trisomy/genetics , Child , Humans , MaleABSTRACT
La trisomía parcial 4q es una enfermedad cromosómica rara, causada por una duplicación de una porción del cromosoma 4. En la mayoría de los casos resulta de una translocación balanceada de uno de los progenitores; siendo menos frecuente la aparición de novo. Presentamos un paciente con una duplicación parcial de novo del segmento distal del brazo largo del cromosoma 4 (q31, q35) asociada a translocación robertsoniana entre los cromosomas 14 y 21; asociación previamente no descrita. En la duplicación 4q no queda bien definida la relación entre el fenotipo y las partes del segmento duplicadas, aunque parece claro que anomalías renales y/o de pulgares son una manifestación característica. Revisamos la literatura médica, y de los casos previamente descritos con trisomía q31-35 concluimos que esta región del cromosoma 4 también estaría comprometida en constituir el "síndrome de la trisomía parcial 4q" o "síndrome aurículo-acro-renal"(AU)
The partial trisomy 4q is a strange chromosomal illness. This illness is caused by the duplication of a portion of chromosome 4. In most of the cases, it is the result of a balanced translocation in one of the progenitors. The "de novo" appearance is less common. We present a patient with a partial "de novo" duplication in the distal segment of the long arm of chromosome 4 (q31, q35), in association with Robertsonian translocation between chromosomes 14 and 21. This association has not been described previously. In the 4q duplication, the relationship between the phenotype and the parts of the duplicated segment is not well defined, although it seems clear that the renal anomalies and/or thumbs abnormalities are a characteristic manifestation. We have reviewed the literature and, of the cases previously described with trisomy q31-35, we came to the conclusion that this region of chromosome 4 may also be involved in constituting the "Syndrome of partial trisomy 4q" or Auriculo-acro-renal Syndrome" (AU)
Subject(s)
Humans , Male , Child , Gene Duplication , Trisomy/genetics , Chromosomes, Human, Pair 4/genetics , Facies , Abnormalities, Multiple/etiology , Hydronephrosis/geneticsABSTRACT
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