Peripheral ossifying fibroma: A well circumscribed firm nontender soft tissue enlargement is present on the gingiva facial to the mandibular right canine.

Peripheral ossifying fibroma: Low power microscopic image demonstrating numerous fibroblasts, collagen and basophilic mineralized material.

Peripheral ossifying fibroma: Low power microscopic image demonstrating numerous fibroblasts, collagen and basophilic mineralized material.

Peripheral ossifying fibroma: High-power microscopic image demonstrating numerous fibroblasts, sparse collagen and basophilic mineralized material.

Peripheral ossifying fibroma: A well circumscribed firm soft tissue enlargement is present on the interdental papilla between the mandibular right lateral incisor and canine. The lesion has an erythematous surface, probably due to trauma.