Turner Syndrome: Classification

According to the ICD-10 (International Statistical Classification of Diseases and Related Health Problems), Turner syndrome is classified as follows, depending on the suspected etiology (cause):

  • Q96.0: karyotype 45,X
  • Q96.1: Karyotype 46,X iso (Xq)
  • Q96.2: Karyotype 46,X with gonosome abnormality, except iso (Xq).
  • Q96.3: mosaic, 45,X/46,XX or 45,X/46,XY
  • Q96.4: Mosaic, 45,X/other cell line(s) with gonosome abnormality
  • Q96.8: Other variants of Turner syndrome.
  • Q96.9: Turner syndrome, unspecified