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Peripheral odontogenic fibroma.

A Buchner¹, G Ficarra, L S Hansen

¹Department of Stomatology, School of Dentistry, University of California, San Francisco.

Oral Surgery, Oral Medicine, and Oral Pathology

|October 1, 1987

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Peripheral odontogenic fibroma (WHO type) is an uncommon gingival lesion. This study details nine cases, revealing a broad histopathologic spectrum and clarifying its distinction from peripheral ossifying fibroma.

Area of Science:

Oral Pathology
Odontogenic Tumors

Background:

Peripheral odontogenic fibroma (WHO type) is a rare gingival lesion, with limited understanding of its full histomorphologic spectrum due to few reported cases.
It is recognized as the extraosseous counterpart to central odontogenic fibroma.

Observation:

This study presents nine cases of peripheral odontogenic fibroma, highlighting diverse histopathologic findings.
Variations in connective tissue cellularity and collagenization were observed, ranging from myxomatous to highly cellular and well-collagenized.
Odontogenic epithelium was consistently present, with mineralized matrix and juxtaepithelial hyalinization noted in a subset of cases.

Findings:

The diverse histopathologic features observed suggest that these variations represent a spectrum of peripheral odontogenic fibroma (WHO type).

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The presence of mineralized matrix and juxtaepithelial hyalinization are notable findings within this spectrum.

Consistent presence of odontogenic epithelium confirms the odontogenic origin.

Implications:

Consolidating these diverse presentations under the umbrella term peripheral odontogenic fibroma (WHO type) avoids introducing new diagnostic terminology.
Using the designation 'WHO type' is crucial for differentiating these lesions from peripheral ossifying fibromas, with which they are often confused.
This expanded understanding of the histopathologic spectrum aids in accurate diagnosis and classification of gingival lesions.