A and B, Fibrous dysplasia of the right maxilla demonstrating asymmetric expansion. B is mirror image.

A and B, Fibrous dysplasia of the right maxilla demonstrating asymmetric expansion. B is mirror image.

Fibrous dysplasia. Periapical radiograph showinga diffuse "ground-glass" radiographic appearance.

Fibrous dysplasia.

Fibrous dysplasia of the maxilla as demonstrated in a computed tomography (CT) scan.

Fibrous dysplasia of the mandible.

Fibrous dysplasia exhibiting fibroblastic matrix and uniform distribution of bony trabeculae (purple, not decalcified).

Fibrous dysplasia showing vascular fibroblastic matrix and irregular trabeculae of new bone.

Ossifying fibroma . Gross specimen showing awell-circum scribed tumor that shelled out in one piece.

Ossifying fibroma.

Ossifying fibroma. This low-magnification photomicrograph shows a well-circumscribed solid tumor mass.Trabeculae of bone and droplets of cementum-like material can beseen forming within a background of cellular fibrous connectivetissue.

Ossifying fibroma. High-power photomicrograph showing a mixture of woven bone and cementum-like material.Note the spherules demonstrating peripheral

brush borders (arrow)

Periapical cemento-osseous dysplasia

Cementa-osseous dysplasia. low-power photomicrograph showing fragments of cellular fibrous connective tissue containing scattered trabeculae of bone.

Cementa-osseous dysplasia. High-power photomicrograph showing spicules of bone and cementum-like hard tissue within moderately cellular fibrous connective tissue, Note the hemorrhage around the bony trabeculae.