The secretory subtype of meningioma (pictured here) is just one of many variants of meningioma, a usually histologically benign tumor that arises from the meninges (i.e. the outer coverings overlying the brain) and often contains concentrically-layered calcifications called psammoma bodies.  The secretory variant can be suspected on imaging by the exuberant edema often seen in the adjacent brain tissue.  Microscopically,... Continue Reading →