Lipoma of the corpus callosum a case report
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LIPOMA OF THE CORPUS CALLOSUM A CASE REPORT. M. SAIDI, Z. KHADIMALLAH, S. JERBI OMEZZINE, K. BOUSLAMA, K. MRAIDHA, HA. HAMZA Department of Medical Imaging, Tahar Sfar University Hospital Center, Mahdia, Tunisia. NR10. INTRODUCTION.

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LIPOMA OF THE CORPUS CALLOSUM A CASE REPORT

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Lipoma of the corpus callosum a case report

LIPOMA OF THE CORPUS CALLOSUM A CASE REPORT

M. SAIDI, Z. KHADIMALLAH, S. JERBI OMEZZINE, K. BOUSLAMA,

K. MRAIDHA, HA. HAMZA

Department of Medical Imaging, Tahar SfarUniversityHospital Center, Mahdia, Tunisia

NR10


Introduction

INTRODUCTION

  • Lipomas of the corpus callosum are rare congenital conditions.

  • These lesions are often asymptomatic but may present as epilepsy, hemiplegia, dementia or headache.

  • Computerized tomography and magnetic resonance imaging make the diagnosis of lipomas feasible at any site of the intracranial space.


Case report

CASE REPORT

  • An 18 months-old healthy boy presented at urgency with head injury. Axial CT scans with sagittal reconstructions were performed.

  • CT scans have revealed a low density inter-hemispheric lesion (-50 to -70 HU ) involving the corpus callosum from genu through the body into the splenium .

  • The Low-attenuation values indicative of fat within the lesion and the absence of calcification were suggestive of corpus callosum lipoma.


Lipoma of the corpus callosum a case report

Axial and sagittal CT scans : Low density inter-hemispheric lesion

with Low-attenuation values indicative of fat


Discussion

DISCUSSION


Corpus callosum anatomy

CORPUS CALLOSUM ANATOMY

  • The corpus callosumis a wide, flat bundle of neural fibers beneath the cortex in the eutherian brain at the longitudinal fissure.

  • Theposterior portion of the corpus callosum is called the splenium; the anterior is called the genu (or "knee"); between the two is the truncus, or "body", of the corpus callosum.

  • The isthmus is The part between the body and the splenium

  • Therostrum is the part of the corpus callosum that projects posteriorly and inferiorly from the anterior most genu


Sagittal t1 weighted mri of the brain shows the normal appearance of the corpus callosum

Sagittal T1-weighted MRI of the brain shows the normal appearance of the corpus callosum.


Corpus callosum functions

CORPUS CALLOSUM FUNCTIONS

  • The corpus callosum is the largest white matter structure

    in the brain.

  • It connects the left and right cerebral hemispheres

  • It ‘s involved in several functions of the body including:

    • Communication Between Brain Hemispheres

    • Eye Movement

    • Maintaining the Balance of Arousal and Attention

    • Tactile Localization…


Corpus callosum lipoma

CORPUS CALLOSUM LIPOMA

  • Lipomas of the central nervous system are extremely uncommon in contrast to those arising elsewhere, and are estimated to comprise less than 0.1% of all intracranial tumors .

  • The majority of intracranial lipomas occur in the midline region and corpus callusum lipomas represents 30 to 50% of all intracranial lipomas.

  • It’s considered as a congénital brain malformation rather than a true neoplasm and it’s often associated with partial or complete corpus callosum agenesis


Clinical manifestations

CLINICAL MANIFESTATIONS

  • A patient with this tumor is often asymptomatic, which is the case in our observation, and the locc is discovered accidently

  • Symptoms depends on associated malformations .

  • Patients may suffer from convulsions, mental retardation, motor disturbances, headaches, visual disturbances, vertigo and vomiting, Intracranial hypertension .

  • Epilepsy is one of the most frequent symptoms


Diagnostic imaging ct

DIAGNOSTIC IMAGING : CT

  • Computed tomography reveals a typical interhemispheric lesion of variable extent, depending on part or complete involvement of corpus callosum..

  • Low-attenuation values indicative of fat (-50 to -100 HU) can be easily established within the lesion.

  • Curvilinear calcification has been consistently reported; however ; there was no calcification in our case.

  • The presence of calcifications , prospect differential diagnosis with dermoid cysts and teratomas, and the diagnosis of corpus callosum lipoma could not be certain.


Diagnostic imaging ct1

DIAGNOSTIC IMAGING : CT

Axial CT scan: interhemispheric hypodense

area containing calcific component.

Axial CT scan: low density inter-hemispheric lesion (-50 to -70 HU ).

Neuroanatomy (2009) 8: 39–42


Diagnostic imaging mri

DIAGNOSTIC IMAGING : MRI

  • MR scans do not leave doubts, infact fat signal is characteristically hyper in T1w and T2w sequences, and in FATSAT sequences it is suppressed

Axial and coronal MR scans: interemispheric area of hyperintensity

in T1 and T2, it becomes hypointense in FS (fat saturation) sequences

Neuroanatomy (2009) 8: 39–42


Treatement and evolution

TREATEMENT AND EVOLUTION

  • There’s no indication to surgical treatment in isolated (pure) corpus callosum lesions; on the other hand, surgical outcomes are controversial because is difficult a complete debulking that spare the nervovascular structures involved

  • Prognosis and symptoms depends on associated malformations .

  • Risks to be considered, above all in the evolutive age, are hydrocephalus and epilepsy.


Conclusion

CONCLUSION

  • Intra-cranial lipomas are extremely rare brain tumors. Lipomas of corpus callosum constitute the commonest variety of all intra-cranial lipomas and are associated with varying degrees of dysgenesis of corpus callosum.

  • CT can make the diagnosis but MRI is a procedure of choice in the evaluation of corpus callosum lipomas and eventual associated malformations.


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