The Processus clinoideus anterior can serve as the site of origin for Meningioma. These rare[^1] meningiomas are then referred to according to their location as clinoidal meningiomas or anterior clinoid process meningiomas.
Symptoms
Anterior clinoid process meningiomas frequently present with unilateral visual impairment[^3].
Classification
Anterior clinoid process meningiomas can be divided into 3 groups according to Al-Mefty[^2].
Figure
EnlargeSchematic illustration of an anterior clinoid process meningioma. Figure adapted from M. Sughrue et al. 2015.
Imaging
The gold standard for imaging anterior clinoid process meningiomas is MRI imaging. In particular, contrast-enhanced T1-weighted sequences provide optimal visualization for assessment.
EnlargeMRI images in three different planes of a clinoidal meningioma.EnlargeAxial MRI of a patient with a right-sided anterior clinoid process meningioma.EnlargeCoronal MRI of a patient with a right-sided anterior clinoid process meningioma.EnlargeContrast-enhanced sagittal MRI of a patient with an anterior clinoid process meningioma.EnlargeAxial MRI of a left-sided anterior clinoid process meningioma.
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