Trisomy 21

• Etiology: congenital
• Complications:
  — Moya Moya syndrome
  — O-C1, C1-C2 instability
  — Peripheral lung cysts
  — AV canal, ASD, VSD
  — Duodenal atresia
  — Annular pancreas
  — Hirschprung disease
  — Trident hands

Cases of Trisomy 21