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Mosaic trisomy 12

Disease definition

Mosaic trisomy 12 is a rare chromosomal anomaly syndrome, with a highly variable phenotype, principally characterized by developmental or growth delay, short stature, craniofacial dysmorphism (e.g. turricephaly, tall forehead, downslanting palpebral fissures, posteriorly rotated and low set ears, narrow palate), congenital heart defects (e.g. atrial septal defect, patent ductus arteriosus), hypotonia, and pigmentary dysplasia. Scoliosis, hearing loss, facial/body asymmetry, and intellectual disability have also been reported.

ORPHA:1698

Classification level: Disorder
  • Synonym(s):
    • Mosaic trisomy chromosome 12
    • Trisomy 12 mosaicism
  • Prevalence: <1 / 1 000 000
  • Inheritance: -
  • Age of onset: Antenatal, Neonatal
  • ICD-10: Q92.1
  • OMIM: -
  • UMLS: -
  • MeSH: -
  • GARD: -
  • MedDRA: -
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