Partial trisomy 18q12, due to intrachromosomal duplication, is not associated with typical 18 trisomy phenotype

@article{Fryns1979PartialT1,
  title={Partial trisomy 18q12, due to intrachromosomal duplication, is not associated with typical 18 trisomy phenotype},
  author={J. P. Fryns and L. Vinken and Jan Marien and H. Van den Berghe},
  journal={Human Genetics},
  year={1979},
  volume={46},
  pages={341-344}
}
Partial 18q12 trisomy, due to intrachromosomal duplication, was found in a severely mentally retarded boy. The finding of nonspecific dysmorphism in this patient demonstrates that trisomy of band 18q12 is accompanied by neither a full nor an incomplete 18 trisomy phenotype, indicating that this phenotype may be due solely to trisomy of the 18q11 band. 

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