1/7. Atypical peripheral ossifying fibroma. A case report.The typical peripheral ossifying fibroma (POF) usually occurs on the free margin of the gingiva. POF is also thought to arise from the periodontal ligament. The case presented here is unique by virtue of its etiology, size and location.- - - - - - - - - - ranking = 1keywords = periodontal ligament, ligament (Clic here for more details about this article) |
2/7. Developing cementoblastoma: case report and update of differential diagnosis.The benign cementoblastoma is a rare odontogenic tumor that tends to occur in the jaws of young people. It is most commonly characterized as a circumscribed radiopaque mass attached to the tooth roots and rimmed by a thin radiolucent zone. Early lesions, however, are radiolucent and can be confused with periapical conditions resulting from nonvital teeth. The tumor is seldom recognized until it produces pain or expansion of the jaw. If the diagnosis is established early, the tooth can be saved by endodontic treatment followed by apical root resection and surgical enucleation of the tumor. This case report documents the origin, development, and unlimited growth potential of a cementoblastoma. Radiographs taken at yearly intervals reveal an initial widening of the periodontal ligament space that grew into a 3-cm mixed radiolucent and radiopaque tumor over a 4-year period. The differential diagnosis and some criteria to help distinguish the cementoblastoma from similar-appearing lesions are reviewed.- - - - - - - - - - ranking = 1keywords = periodontal ligament, ligament (Clic here for more details about this article) |
3/7. Peripheral ossifying fibroma. Report of a case and review of the literature.Peripheral ossifying fibroma, a reactive gingival disorder known under the generic term of epulis, is widely considered to originate from the cells of the periodontal ligament. A 39-year-old woman presented with a well circumscribed, hard pedunculated exophytic tumor measuring 2 cm in size, without ulceration. The lesion had developed three months before in the interdental space, between the lower left lateral incisor and canine. No radiological signs of involvement of the alveolar ridge were observed, and the clinically manifest diastema was confirmed. The histological study of the specimen after simple resection with a cold scalpel confirmed the diagnosis of peripheral ossifying fibroma. The patient posteriorly suffered three recurrences that were respectively treated via simple resection, carbon dioxide laser exeresis and finally wide resection including the periodontal ligament, periosteum and underlying bone. There have been no further recurrences following wide resection. In addition to presenting this new case of peripheral ossifying fibroma, the present study reviews the literature, comments on the predisposing factors and treatment options, and suggests the importance of this disorder in the differential diagnosis of gingival lesions.- - - - - - - - - - ranking = 2keywords = periodontal ligament, ligament (Clic here for more details about this article) |
4/7. frontal sinus cementifying ossifying fibroma.Cementifying ossifying fibroma is a fibro-osseous lesion which produces cementum. Cementifying ossifying fibroma is a mesodermal, non-odontogenic tumor of ectopic multipotential periodontal membrane blast cells. Although, it is a benign bone tumor, it has an aggressive destructive behavior in patients under 20 years of age with high tendency for recurrence. Cementifying ossifying fibroma can be recognized microscopically by the presence of cementicles. This is a case of frontal sinus cementifying ossifying fibroma presenting with proptosis in a 39-year-old male.- - - - - - - - - - ranking = 1.4505451898964E-5keywords = membrane (Clic here for more details about this article) |
5/7. Isolated cementoossifying fibroma of the ethmoid bulla: a case report.Cementoossifying fibroma is a rare nonodontogenic tumor of the periodontal membrane that arises from the mesodermal germ layer. This nonneoplastic, locally destructive tumor has occurred as an osseous lesion in the mandible, the maxilla, the zygoma, all the paranasal sinuses, and the orbital and petromastoid regions. It has occurred as an extraosseous lesion in the gingiva and the auricle. The diagnosis requires correlating a variety of clinical, radiologic, and histologic factors. The recurrence rate is high, particularly for lesions in the paranasal sinuses. Surgical management via a local excision as wide as possible is suggested. We describe the case of a 32-year-old woman with an isolated cementoossifying fibroma of the right ethmoid bulla, and we review the diagnosis, differential diagnosis, and management of this tumor- - - - - - - - - - ranking = 1.4505451898964E-5keywords = membrane (Clic here for more details about this article) |
6/7. Ossifying fibromyxoid tumor of soft parts: a morphological and immunohistochemical study.A case is presented of ossifying fibromyxoid tumor of soft parts (OFMTSP) which occurred in the left cheek of a 59 year old Chinese woman. Histologically, the tumor was located in the subcutis with a fibrous pseudocapsule that contained discontinuous rims of mature trabecular bone. The tumor cells were small, round to ovoid with a uniform, round nucleus and a pale or slightly eosinophilic cytoplasm. Most of the cells were arranged in a random manner, some in a vague lace-like pattern. Mitotic figures were extremely rare. The stroma appeared fibromyxoid with scattered foci of mucinous lakes. Immunohistochemically, most of the neoplastic cells displayed immunoreactivities for S-100 protein, S-100 protein alpha, vimentin and alpha-smooth muscle actin; many tumor cells were positive for desmin. The tumor also showed stromal immunoreactivity for type IV collagen and was negative for cytokeratins, epithelial membrane antigen, glial fibrillary acidic protein, neurofilaments, muscle-specific actin, Leu-7, myelin-basic protein, osteocalcin and melanoma-specific antigen. The immunophenotypes expressed by the present OFMTSP seem to reflect two lineages of neoplastic cell differentiation, that is of nerve sheath and of smooth muscle; at the present stage, it is premature to diagnose this lesion as either nerve sheath or smooth muscle tumor.- - - - - - - - - - ranking = 1.4505451898964E-5keywords = membrane (Clic here for more details about this article) |
7/7. Cemento-ossifying fibroma of the petromastoid region: case report and review of the literature.The cemento-ossifying fibroma (COF) is a mesodermal, non-odontogenic tumour of ectopic multipotential periodontal membrane blast cells. It is aggressive, locally destructive, and has a high recurrence rate. A case report of COF of the petromastoid region is presented. This location has not been described until now. Trauma may act as a trigger to sudden growth of the atopic periodontal tissue. Due to the aggressive behaviour of this tumour and its frequent recurrence radical surgery is needed.- - - - - - - - - - ranking = 1.4505451898964E-5keywords = membrane (Clic here for more details about this article) |