Abstract：
BACKGROUND:The magnetic resonance imaging (MRI) characteristics of evolving duodenal hematomas in children are unknown. OBJECTIVE:To describe the MRI changes exhibited by evolving duodenal hematomas and the likely mechanisms behind these changes. MATERIALS AND METHODS:We retrospectively reviewed the MR features of intramural duodenal hematomas (6 lesions, 10 examinations) studied on a 1.5-T MR unit. All patients had clinical histories of blunt abdominal trauma or endoscopic procedures and we were able to determine the time interval between the onset and MR imaging. We evaluated and analyzed the appearance and signal intensity patterns of hematomas of varying ages and we compared the results with those in previously reported intracranial hematomas. RESULTS:The imaging appearances on five examinations were consistent with presence of deoxyhemoglobin. Two of these lesions were hypointense on T2-weighted images and iso- to hyperintense on T1-weighted images. Three had heterogeneous appearances on both T1- and T2-weighted images, and the bulk of the hematoma progressively increased in size and signal intensity on T2-weighted images. On the remaining five examinations, one lesion was hyperintense on T1-weighted images and iso- to hyperintense on T2-weighted images, consistent with intracellular methemoglobin, and four lesions were hyperintense on both T1- and T2-weighted images, consistent with the presence of extracellular methemoglobin. Duodenal hematoma stages were slower than those of intracranial hematomas; the acute stage spanned 2-7 days, and early and late subacute stages occurred 10-17 days after the injury. CONCLUSION:Duodenal hematomas evolve like intracranial hematomas, but slower. Signal heterogeneity is common in the acute stage.
journal_name
Pediatr Radioljournal_title
Pediatric radiologyauthors
Zhou H,Ma X,Sheng M,Lai C,Fu Jdoi
10.1007/s00247-018-4178-9subject
Has Abstractpub_date
2018-10-01 00:00:00pages
1593-1599issue
11eissn
0301-0449issn
1432-1998pii
10.1007/s00247-018-4178-9journal_volume
48pub_type
杂志文章abstract：:A case of thanatophoric dwarfism living for 10 weeks with minimal supportive care is presented. Although early death is usual, survival for months is compatible with the diagnosis. ...
journal_title：Pediatric radiology
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