ossifying fibroma


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fibroma

 [fi-bro´mah] (pl. fibromas, fibro´�mata)
a tumor composed mainly of fibrous or fully developed connective tissue. Called also fibroid and fibroid tumor.
ameloblastic fibroma an odontogenic fibroma, marked by simultaneous proliferation of both epithelial and mesenchymal tissue, without formation of enamel or dentin.
cementifying fibroma cementoblastoma; a tumor usually occurring in the mandible of older persons and consisting of fibroblastic tissue containing masses of cementum-like tissue.
chondromyxoid fibroma of bone a benign slowly growing tumor of chondroblastic origin, usually affecting the long bones of the lower limb.
cystic fibroma one that has undergone cystic degeneration.
fibroma myxomato´des myxofibroma.
nonosteogenic fibroma a degenerative and proliferative lesion of the medullary and cortical tissues of bone.
odontogenic fibroma a rare benign tumor of the jaw arising from the embryonic portion of the tooth germ, the dental papilla, or dental follicle.
ossifying fibroma (ossifying fibroma of bone) a benign, relatively slow-growing, central bone tumor, usually of the jaws, especially the mandible, which is composed of fibrous connective tissue within which bone is formed.

ossifying fibroma

[os′ifī′ing]
Etymology: L, os + facere, to make
a slow-growing, benign neoplasm, occurring most often in the jaws, especially the mandible. The tumor is composed of bone that develops within fibrous connective tissue.

osteofibrous dysplasia

A rare, self-limiting non-neoplastic lesion which usually arises in the cortex of the tibia and fibula, or both, most often in the middle third of the diaphysis, affecting children < age 15.
 
Clinical findings
Pain, pathological fracture, swelling, deformity; may be asymptomatic for up to 5 years.

Imaging
Well-defined intramedullary lytic lesion with a sclerotic rim; the cortex often is expanded and thinned, with multiple radiolucencies admixed with intervening areas of sclerosis.
References in periodicals archive ?
Localized gingival enlargement associated with alveolar process expansion', peripheral ossifying fibroma coincident with central odontogenic fibroma.
Osteoma was considered the most likely of the benign mesenchymal tumors, which also include ossifying fibroma and fibrous dysplasia, because of the quantity of trabecular bone and the presence of osteoblasts and osteoclasts.
Pathologic diagnosis: Benign tumors Diagnosis n (%) Hemangioma 5 (9) Ossifying fibroma 4 (7) Adnexal neoplasm 1 (2) Ameloblastic fibro-odontoma 1 (2) Benign fibrous histiocytoma 1 (2) Blue nevus 1 (2) Compound nevus 1 (2) Epithelioma adenoides cysticum 1 (2) Giant cell granuloma 1 (2) Lymphangioma 1 (2) Neurofibroma 1 (2) Osteochondroma 1 (2) Port wine stain 1 (2) Spitz nevus 1 (2) Xanthogranuloma 1 (2) Total 22 (41) Table 4.
Aggressive psammomatoid ossifying fibromas (APOFs) represent a subgroup of related fibro-osseous lesions that appears to be unique to the nasal cavity, paranasal sinuses, and orbit.
Psammomatoid (juvenile) ossifying fibroma of the orbit.
2) Histologically, an ossifying fibroma is a densely cellular, well-defined fibrous tumor that begins ossifying at the periphery.
Ossifying fibromas may have features that are characteristic of fibrous dysplasias (e.
Benign processes include nasal polyps, mucoceles, meningoencephaloceles, chrondromas, osteomas, ossifying fibromas, and cementomas.
Four types of fibro-osseous lesions are listed by the World Health Organization: fibrous dysplasia, ossifying fibromas, cementing fibromas, and cementoossifying fibromas.
5) Eggshell-like bony capsules may also be seen in ossifying fibromas and cemento-ossifying fibromas, (6) which are monostotic expansive tumors that are known to occur in the maxillary sinus.
Fibrous dysplasias and ossifying fibromas demonstrate replacement of normal medullary bone with fibrous tissue; radiographically, they have a ground-glass appearance.
calcified nasal polyps, ossifying fibromas, osteomas, and chondromas), and malignant tumors (e.