Thoracolumbar Kyphosis and Lumbosacral Hyperlordosis in Achondroplastic Children

  • Steven E. Kopits
Part of the Basic Life Sciences book series (BLSC, volume 48)


The thoracolumbar (TL) kyphosis is present at birth, or is noticed within the first 6 months in about 95% of newborns. The curve becomes more pronounced and gains its maximal expression when the child becomes a sitter, between 6 and 18 months of age (Fig. la,b). It noticeably improves or even disappears in most children with the advent of stance and gait, simultaneously with the development of lumbosacral lordosis. Some infants, however, develop vertebral wedging of the apical vertebra that insures the permanence of a residual structural curve. Many other achondroplasts adopt a kyphotic posture while sitting throughout life even if they do not have a structural, clinically appearing kyphosis when standing.


Skeletal Dysplasia Apical Vertebra Intervertebral Disc Space Ossific Nucleus Vertebral Wedging 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    A. Siebens and D. Hungerford, Curves of the achondroplastic spine: new hypothesis, J. Hopkins Med. Jour. 142:205 (1978).Google Scholar

Copyright information

© Plenum Press, New York 1988

Authors and Affiliations

  • Steven E. Kopits
    • 1
    • 2
  1. 1.International Center for Skeletal DysplasiaSaint Joseph HospitalTowsonUSA
  2. 2.Dept. of Orthopedic SurgeryThe Johns Hopkins Univ. School of MedicineBaltimoreUSA

Personalised recommendations