Thoracolumbar Kyphosis and Lumbosacral Hyperlordosis in Achondroplastic Children
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.
KeywordsSkeletal Dysplasia Apical Vertebra Intervertebral Disc Space Ossific Nucleus Vertebral Wedging
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