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a Axial CT image of juvenile psammomatoid ossifying fibroma demonstrates an expansile mass centered within bilateral sphenoid sinuses with erosion of the clivus and pterygoids. It shows low radiodensity with a thin rim of retained native bone (arrow). b–d Juvenile psammomatoid ossifying fibroma is moderately to highly cellular with a haphazard growth pattern and innumerable deposits of bone with concentric calcification reminiscent of psammoma bodies
