Abstract：
BACKGROUND:High-signal T2-weighted bone marrow changes can be found in both bone marrow edema and hematopoietic marrow and are often seen on pediatric MR images of the feet and ankle. OBJECTIVE:To evaluate whether high-signal T2 changes of the bone marrow seen on pediatric MRI of feet and ankles represent residual hematopoietic marrow. MATERIALS AND METHODS:A total of 402 bones in 41 pediatric MRI studies of feet and ankles (34 children, 1-18 years) were reviewed by two observers who were blinded to the patients' ages. The studies were reviewed for the presence of high-signal changes of the bone marrow on sagittal fluid-sensitive images. The frequency and location of these foci were correlated with the patients' ages. RESULTS:High-signal T2 changes of the bone marrow were seen in 45/402 bones (11%) and in 24/41 patients younger than 16 years (59%). The changes were most commonly located in the calcaneus (54%), followed by the talus (35%) and navicular bone (35%), invariably at the endosteal surface. In 16 ankles, such foci were seen in the feet but not in the distal tibia/fibula. Symmetric presence (two ankles) or absence (four ankles) of high-signal marrow were seen in six of seven patients with bilateral ankles. CONCLUSION:High-signal T2 changes of the bone marrow in pediatric feet and ankle MRIs have a symmetric, fairly consistent pattern and disappear after the age of 15 years. We believe that these high-signal areas are normal and represent residual hematopoietic marrow.
journal_name
Pediatr Radioljournal_title
Pediatric radiologyauthors
Shabshin N,Schweitzer ME,Morrison WB,Carrino JA,Keller MS,Grissom LEdoi
10.1007/s00247-006-0129-ysubject
Has Abstractpub_date
2006-07-01 00:00:00pages
670-6issue
7eissn
0301-0449issn
1432-1998journal_volume
36pub_type
杂志文章abstract：BACKGROUND:It has been suggested that increased hepatic and intramuscular fat is associated with insulin resistance, and that increased pancreatic fat is related to impaired insulin secretion. OBJECTIVE:We postulated that in obese nondiabetic teenagers insulin levels would be directly related to increases in intramusc...
journal_title：Pediatric radiology
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doi：10.1007/s00247-005-1413-y
更新日期：2005-06-01 00:00:00
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journal_title：Pediatric radiology
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journal_title：Pediatric radiology
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journal_title：Pediatric radiology
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journal_title：Pediatric radiology
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journal_title：Pediatric radiology
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journal_title：Pediatric radiology
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journal_title：Pediatric radiology
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更新日期：2011-02-01 00:00:00
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journal_title：Pediatric radiology
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doi：10.1007/BF02020841
更新日期：1995-01-01 00:00:00
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journal_title：Pediatric radiology
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更新日期：2004-02-01 00:00:00
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journal_title：Pediatric radiology
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更新日期：2008-12-01 00:00:00
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journal_title：Pediatric radiology
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更新日期：1998-12-01 00:00:00
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journal_title：Pediatric radiology
pub_type： 杂志文章
doi：10.1007/s00247-014-2959-3
更新日期：2014-09-01 00:00:00
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journal_title：Pediatric radiology
pub_type： 杂志文章
doi：10.1007/BF02012486
更新日期：1992-01-01 00:00:00
abstract：:Transient cortical blindness is reported to occur in 0.3% to 1% of cerebral angiography procedures. It develops within minutes of contrast medium injection and lasts for up to several days. We report a long episode of transient cortical blindness in a 17-year-old boy with cerebellar haemangioblastoma, which started du...
journal_title：Pediatric radiology
pub_type： 杂志文章
doi：10.1007/s00247-009-1335-1
更新日期：2009-11-01 00:00:00
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更新日期：2014-09-01 00:00:00
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journal_title：Pediatric radiology
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更新日期：1989-01-01 00:00:00
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journal_title：Pediatric radiology
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doi：10.1007/BF00975540
更新日期：1978-02-28 00:00:00
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更新日期：2006-10-01 00:00:00
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journal_title：Pediatric radiology
pub_type： 杂志文章,评审
doi：10.1007/BF01372106
更新日期：1996-01-01 00:00:00
