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.

Ossify ing fib roma. This low-magnification photomicrograph showsa well-circumscribed solid tumor mass.Trabeculae of bone and droplets of cement um-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 conta in ing scattered trabeculae of bone.

Cementa-osseous dysplasia. High-power photomicrograph showing spicules of bone and cementum-like hard tissue within moderately ce llular fibrous connectivet issue, Note the hemorrhage around t he bony trabeculae.