Psammoma bodies in a psammomatous variant of meningioma.

Psammoma bodies, lamellated purple concretions composed of calcium and other ions, are commonly found in meningiomas and are particularly numerous in the psammomatous variant of meningioma, pictured here.  Psammomatous meningiomas are low grade (WHO grade I) tumors that often have a gritty texture on gross evaluation due to increased numbers of psammoma bodies and dystrophic calcification often necessitating... Continue Reading →

Intraventricular Meningioma

Although meningiomas are classically dura-based lesions, they can also arise in the choroid plexus and, thus, must be considered in the differential diagnosis for intraventricular lesions.  This intraventricular meningioma, shown here, is growing underneath normal choroid plexus epithelium.

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