Fibromas Flashcards
What is the most common tumor of the oral cavity?
Fibroma
What is fibroma?
Reactive hyperplasia of fibrous CT in response to local irritation or trauma
What is the most common location of a fibroma?
Buccal mucosa along the bite line
Other sites include the labial mucosa, tongue and gingiva
Gingival fibromas represent a fibrous maturation of what lesion?
Fibrous maturation of a pre-existing pyogenic granuloma
Clinical appearance of fibromas
Smooth surfaced pink nodule that is similar in color to the surrounding mucosa .
Surface may appear white as a result of hyperkeratosis from continued irritation
How may the appearance of fibromas differ in blacks?
gray-brown pigmentation
Are fibromas normally sessile or pedunculated?
Most are sessile but some are pedunculated
Where do frenal tags occur?
Maxillary labial frenum
What is the histopathologic feature of fibromas?
Exophytic, nodular mass of dense fibrous CT covered by stratified squamous epithelium
CT is usually dense and collagenized
Are fibromas encapsulated?
No, fibrous tissue blends gradually into the surrounding CT
Tx for fibromas?
Conservative surgical excision
Why is it necessary to submit excised tissue for microscopic examination?
Other benign and malignant tumors may mimic the clinical appearance of a fibroma
Is recurrence common in fibroma excisions?
No, they are rare
Is tx necessary for frenal tags?
No, because they are small and easily diagnosed
a retrocuspid papilla is what kind of fibroma?
giant cell fibroma
Where do retrocuspid papilla occur?
developmental lesion that occurs on the gingiva, lingual to the mandibular cuspid
Are retrocuspid papilla commonly unilateral or bilateral?
Bilateral
What’s the normal size of retrocuspid papilla?
Small pink papule less than 5mm in diameter
What is the histopathologic appearance of giant cell fibroma?
Mass of vascular fibrous CT that is loosely arranged and covered by stratified squamous epithelium
Numerous larger multi nucleated stellate fibroblasts exist within the superficial CT
Rete ridges are narrow and elongated
Covering epithelium is thin and atrophic
Tx for giant cell fibroma
Conservative surgical excision
Why do retrocuspid papilla not need to be excised?
Characteristic appearance allows clinical recognition
What is peripheral ossifying fibroma?
A relatively common reactive (rather than neoplastic) gingival growth
What is the origin of mineralized products in peripheral ossifying fibroma?
Origin from cells of the periosteum or PDL
Where does the peripheral ossifying fibroma exclusively occur?
gingiva
