Document Detail

Assessment of skeletal maturation in infants: comparison between two methods in hypothyroid patients.
MedLine Citation:
PMID:  9716638     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Conventional skeletal radiography is the standard technique for assessing skeletal age. However, radiography cannot demonstrate cartilage and is therefore of lesser value in infancy when the ossification centres are composed mainly of cartilage. By comparison, US clearly demonstrates cartilage and bone. OBJECTIVE: In the present study, we compared radiography and sonography for the assessment of skeletal age in neonates and infants. MATERIALS AND METHODS: Because delayed skeletal maturation is a feature of congenital hypothyroidism and assessment of skeletal age is routinely performed in our centre, we studied 55 hypothyroid infants (aged 7-66 days). AP radiographs and sonograms, acquired using high-frequency scanners, were obtained and dimensions of the distal femoral epiphyseal ossification centre (DFE) were compared. RESULTS: Measurements of DFE by the two methods showed excellent correlation (R = 0.94, P = 0.0001). Radiographs did not demonstrate a DFE in 11 infants, and US did not show it in 6. In no infant did radiography demonstrate DFE not seen by US. Moreover, DFE dimensions on US were larger than those measured on radiographs. Infants with absent thyroid gland had a DFE significantly smaller than those infants with ectopic or normally placed glands (P < 0.001), on both radiographs and sonograms. CONCLUSION: Our data suggest that sonography is a valid alternative to standard radiography for the assessment of skeletal age in infants.
P L Paesano; M C Vigone; V Siragusa; G Chiumello; A Del Maschio; S Mora
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Pediatric radiology     Volume:  28     ISSN:  0301-0449     ISO Abbreviation:  Pediatr Radiol     Publication Date:  1998 Aug 
Date Detail:
Created Date:  1998-11-30     Completed Date:  1998-11-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0365332     Medline TA:  Pediatr Radiol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  622-6     Citation Subset:  IM    
Department of Paediatrics, Scientific Institute H San Raffaele, University of Milan, Milan, Italy.
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MeSH Terms
Age Determination by Skeleton / methods*
Analysis of Variance
Congenital Hypothyroidism*
Enzyme-Linked Immunosorbent Assay
Infant, Newborn
Knee / radiography*,  ultrasonography*
Sensitivity and Specificity
Thyrotropin / blood
Reg. No./Substance:

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