Document Detail

Brown fat distribution in the chest wall of infants-normal appearance, distribution and evolution on CT scans of the chest.
MedLine Citation:
PMID:  21643687     Owner:  NLM     Status:  Publisher    
BACKGROUND: While reviewing chest CT scans of infants, we repeatedly observed hyperdense enhancing tissue in the chest wall that is not well described in radiology literature. OBJECTIVE: This study was undertaken to describe the imaging features of this tissue in chest walls of infants. MATERIALS AND METHODS: CT scans of the chest conducted on all infants between April 2008 and October 2009 were retrospectively reviewed. CT studies with any deviation from normal radiation or contrast dose or those with chest wall anatomical distortion were excluded. RESULTS: One hundred eighty-eight infants were scanned, with 202 MDCTs, of which 180 (89.1%) received contrast agent. Fifty-four of 180 (30%) cases revealed focal areas of hyperdensity in various locations. All positive cases ranged between 2 days and 9 months of age. The areas of distribution of hyperdensity had excellent correlation with known areas of brown fat in the chest wall, known from nuclear medicine studies, and hence we concluded these to represent the same. CONCLUSION: Brown fat in the chest wall can be seen as enhancing tissue on contrast CT scans done on infants. This is a normal morphological component with the brown fat converting to normal fat. It is important to recognize it in the chest wall of infants to avoid misinterpretation.
Priya Gupta; Paul S Babyn; Amer Shammas; Stephen F Miller
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-6-4
Journal Detail:
Title:  Pediatric radiology     Volume:  -     ISSN:  1432-1998     ISO Abbreviation:  -     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-6-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0365332     Medline TA:  Pediatr Radiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Diagnostic Imaging, Hospital for Sick Children, 555 University Ave., Toronto, Canada, M5G 1X8,
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