Background Pericallosal lipomas are often associated with pericallosal lipomas (seven curvilinear and four tubulonodular) corpus callosum dysgenesis. The diagnosis of lipoma, sug- were included. All MRI scans were performed in the third gested on ultrasonography, relies on the classic T1 trimester. Curvilinear lipomas were thinner and six cases were hyperintensity on magnetic resonance imaging (MRI). associated with prenatal T1 iso-intensity. Typical T1 However, this feature may be absent prenatally. hyperintensity appeared on postnatal MRI only. All Objective Our objective was to study the changes of T1 in- tubulonodular lipomas were much larger and showed prenatal tensity in fetal lipomas with comparison to postnatal/ T1 hyperintensity. In two patients, the lipoma increased in size postmortem data and to assess the factors influencing the sig- on postnatal MRI. nal variations of pericallosal lipomas on prenatal MRI. Conclusion The type and size of a lipoma influence T1 pre- Materials and methods Patients with callosum dysgenesis natal intensity. Absence of T1 intensity was observed in cur- and interhemispheric hyperechogenicity suggestive of a vilinear lipomas only. Curvilinear lipomas are much thinner. pericallosal lipoma with available postnatal or postmortem Changes in T1 intensity may also be related to fat maturation data were included. Gestational age,
Pediatric Radiology – Springer Journals
Published: Nov 28, 2017
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