Pericallosal lipoma - curvilinear
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A T1/T2 hyperintense curvilinear lesion noted in midline inter hemispheric region extending along superior margin of splenium and body of corpus callosum. Blooming noted on SWI images. No anomalies of corpus callosum noted.
Lacunar infarcts in right centrum semiovale are seen.
Pericalloasal lipomas are congenital pericallosal tumors not actually involving the corpus callosum. They are due to faulty disjunction of neuroectoderm from cutaneous ectoderm during the process of neurulation.
They may be associated with anomalies of corpus callosum.
Differential diagnosis of a fat-containing intracranially mass includes dermoid or teratoma, however, in this case neither are viable alternatives.