Anterior temporal lobe perivascular spaces
Updates to Article Attributes
Anterior temporal lobe perivascular spaces are recently recognised special variants of tumefactive perivascular spaces, which can mimic cystic tumours with surrounding oedema.
Epidemiology
A predilection for women has been reported 1. Age range is wide, from 24 to 86 years of ageold reported 1.
Clinical presentation
As is the case with perivascular spaces elsewhere, no symptoms directly attributable to the lesion are usually identified 1.
Radiographic features
MRI
Unlike tumefactive perivascular spaces elsewhere elsewhere within the brain, anterior temporal lobe perivascular spaces often have surrounding oedema (~80%) which can range from mild to extensive 1. Additionally they are usually associated with a branch of the middle cerebral artery and a focal region of cortical thinning or absence (~90%)1. Otherwise, they have similar appearances to perivascular spaces elsewhere: internal CSF signal on all sequences and no enhancement 1-2.
The size of the cyst invariably remains stable. In contrast, the surrounding oedema can can in a small number of cases change overtimeover time, both increasing or decreasing in conspicuity 1-2.
Treatment and prognosis
No treatment is required provided they are recognised as perivascular spaces. Change in size of the cyst or presence of enhancement should make one doubt the diagnosis. In In some instances (particularly, particularly those with increasing oedema), biopsy may be required to exclude tumour.
-<p><strong>Anterior temporal lobe perivascular spaces</strong> are recently recognised special variants of <a href="/articles/tumefactive-perivascular-spaces-1">tumefactive perivascular spaces</a>, which can mimic cystic tumours with surrounding oedema. </p><h4>Epidemiology</h4><p>A predilection for women has been reported <sup>1</sup>. Age range is wide, from 24 to 86 years of age reported <sup>1</sup>. </p><h4>Clinical presentation</h4><p>As is the case with perivascular spaces elsewhere, no symptoms directly attributable to the lesion are usually identified <sup>1</sup>. </p><h4>Radiographic features</h4><h5>MRI</h5><p>Unlike <a href="/articles/tumefactive-perivascular-spaces-1">tumefactive perivascular spaces</a> elsewhere within the brain, anterior temporal lobe perivascular spaces often have surrounding oedema (~80%) which can range from mild to extensive <sup>1</sup>. Additionally they are usually associated with a branch of the middle cerebral artery and a focal region of cortical thinning or absence (~90%) <sup>1</sup>. Otherwise they have similar appearances to perivascular spaces elsewhere: internal CSF signal on all sequences and no enhancement <sup>1-2</sup>. </p><p>The size of the cyst invariably remains stable. In contrast the surrounding oedema can in a small number of cases change overtime, both increasing or decreasing in conspicuity <sup>1-2</sup>. </p><h4>Treatment and prognosis</h4><p>No treatment is required provided they are recognised as perivascular spaces. Change in size of the cyst or presence of enhancement should make one doubt the diagnosis. In some instances (particularly those with increasing oedema) biopsy may be required to exclude tumour. </p>- +<p><strong>Anterior temporal lobe perivascular spaces</strong> are recently recognised special variants of <a href="/articles/tumefactive-perivascular-spaces-1">tumefactive perivascular spaces</a>, which can mimic cystic tumours with surrounding oedema. </p><h4>Epidemiology</h4><p>A predilection for women has been reported <sup>1</sup>. Age range is wide, from 24 to 86 years old reported <sup>1</sup>. </p><h4>Clinical presentation</h4><p>As is the case with perivascular spaces elsewhere, no symptoms directly attributable to the lesion are usually identified <sup>1</sup>. </p><h4>Radiographic features</h4><h5>MRI</h5><p>Unlike <a href="/articles/tumefactive-perivascular-spaces-1">tumefactive perivascular spaces</a> elsewhere within the brain, anterior temporal lobe perivascular spaces often have surrounding oedema (~80%) which can range from mild to extensive <sup>1</sup>. Additionally they are usually associated with a branch of the middle cerebral artery and a focal region of cortical thinning or absence (~90%) <sup>1</sup>. Otherwise, they have similar appearances to perivascular spaces elsewhere: internal CSF signal on all sequences and no enhancement <sup>1-2</sup>. </p><p>The size of the cyst invariably remains stable. In contrast, the surrounding oedema can in a small number of cases change over time, both increasing or decreasing in conspicuity <sup>1-2</sup>. </p><h4>Treatment and prognosis</h4><p>No treatment is required provided they are recognised as perivascular spaces. Change in size of the cyst or presence of enhancement should make one doubt the diagnosis. In some instances, particularly those with increasing oedema, biopsy may be required to exclude tumour. </p>
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