Aplasia/Hypoplasia involving the vertebral column

• Absent/small backbone
• Absent/small spine
• Absent/small vertebral column
• Absent/underdeveloped backbone
• Absent/underdeveloped spine
• Absent/underdeveloped vertebral column

• has_part some (
      aplastic/hypoplastic and
      inheres in some vertebral column and
      has modifier some abnormal)

• Abnormality of the vertebral column
• Aplasia/hypoplasia affecting bones of the axial skeleton