Susceptibility artifacts in lipomas

Abstract

Contribution of the macroscopic calcification to susceptibility blooming appears to be insignificant. Microscopic mineralization and chemical shift artifact appears to be a major cause of susceptibility blooming.

A Rare Case of Pericallosal Lipoma Associated with Bilaterally Symmetrical Lateral Ventricular Choroid Plexus Lipomas without Corpus Callosal Anomalies

“…The incidence of the corpus callosal and other intracranial anomalies is significantly less in posterior lipomas. [23456789] In our case, the PCLp occupies anterior as well as posterior locations and its posterior part is thicker than the anterior part [Figure 6c]. To the best of our knowledge, this appearance has not previously been described.…”

“…[2] PCLps may have calcification in the periphery and may continue into the lateral ventricles, which is a very rare presentation. [34] Although, PCLp is often described as corpus callosal lipoma, it is most often pericallosal in location. Intracranial lipomas result from anomalous differentiation of persistent primitive meninges.…”

Susceptibility Artifacts in Ruptured Intracranial Dermoid Cysts: A Poorly Understood but Important Phenomenon

“…They also hypothesized a susceptibility gradient across the lipid-tissue boundary as a cause of blooming as suggested by Lingegowda et al 22 . Sudhir et al also reported blooming of fat globules on SWI within an arachnoid cyst 24 .…”

“…In a case series of SWI in intracranial lipomas, the authors postulated microscopic calcifications and mineralization due to foci of osseous metaplasia as a cause for blooming of fat on SWI 22 . No significant contribution of macroscopic calcification was observed as all the lipomas showed blooming, irrespective of whether or not calcification was identified on CT scan.…”

“…CT scan is helpful showing characteristic fat attenuation within the lesion as well as the fat droplets. A few reports have described the characteristics of fat-containing intracranial lesions on susceptibility-weighted imaging [21][22][23][24] . However, to the best of our knowledge there is no report in the literature describing the SWI characteristics of ruptured intracranial dermoid cyst.…”