1/533. Adenomatoid odontogenic tumor arising in a dental cyst: report of unusual case. The case of an adenomatoid odontogenic tumor developing over a dentigerous cyst is reported. A 12-year-old boy was referred by his pediatric dentist to the service of Oral and Maxillofacial Surgery of the Asturias Central Hospital (spain) for evaluation of a radiolucent image compatible with a dentigerous cyst. Microscopic examination revealed the presence of an adenomatoid odontogenic tumor located over the linear epithelium of a dentigerous cyst. Based on the literature, the clinico-pathological, diagnostic, radiological and therapeutic characteristics of the case are commented in detail. ( info) |
2/533. Clear cell variant of calcifying epithelial odontogenic tumor (CEOT) in the maxilla: report of a case with immunohistochemical and ultrastructural investigations. A rare case of clear cell variant of calcifying epithelial odontogenic tumor is presented with immunohistochemical and ultrastructural investigations. A 14-year-old Japanese girl was admitted with a complaint of swelling in the right posterior maxilla. Radiological examination showed a well-circumscribed radiolucent lesion located close to the impacted third molar. After only a partial tumor excision, the tumor recurred 13 years later. It appeared radiologically as an irregular radiodensity, and a subtotal maxillectomy was performed. Histological examination showed sheets and/or strands composed almost entirely of clear vacuolated epithelial cells in a stroma containing intercellular amyloid-like material and calcification. Histochemical and ultrastructural analysis detected cytoplasmic glycogen granules in the clear cells, and positive immunoreactivities for cytokeratins 8, 13 and 19; filaggrin and anti-ameloblastoma antibodies suggested an odontogenic epithelial origin. ( info) |
3/533. Transformation of ameloblastic fibroma to fibrosarcoma. The direct transformation of an ameloblastic fibroma into a fibrosarcoma in a 16-year-old Caucasian male is reported. Although no ameloblastic epithelium was found in the recurrent tumor, the odontogenic origin of the fibrosarcoma was evident. The ameloblastic fibrosarcoma and the fibrosarcoma of identical odontogenic origin represent an entity which should be distinguished from conventional fibrosarcoma as these tumors demonstrate different clinical behaviors. ( info) |
4/533. Peripheral dentinogenic ghost-cell tumor: a case report. The dentinogenic ghost-cell tumor is a rare solid variant of the calcifying odontogenic cyst. Few peripheral cases of this tumor with clinical and radiographic documentation have been reported. A case of peripheral dentinogenic ghost-cell tumor is presented and the literature is reviewed. ( info) |
5/533. The experience of a senior dental student in diagnosing pathology. Dental school affords the opportunity to use various dental sciences, that is, radiology, pathology, histology, oral and maxillofacial surgery, in determining normal and pathological conditions. The case presented here describes the diagnosis, treatment and management of a rare intraosseous lesion, calcifying epithelial odontogenic tumor (CEOT), from the perspective of a senior dental student. ( info) |
6/533. Cemento-ossifying fibroma presenting as a mass of the parapharyngeal and masticator space. We report a case of cemento-ossifying fibroma that presented as a large extraosseous mass in the masticator and parapharyngeal space. CT scanning and MR imaging showed a large extraosseous mass with central conglomerated, well-matured ossified nodules and fatty marrow. The central matured ossified nodules were of low density on CT scans and high signal intensity on T1- and T2-weighted MR images. Multiplanar reformatted CT scans revealed the origin of the mass to be at the extraction site of the right lower second molar tooth. ( info) |
7/533. Calcifying epithelial odontogenic tumor. A histologic, histochemical, fluorescent, and ultrastructural study. A previously unreported calcifying epithelial odontogenic tumor (CEOT; Pindborg tumor) occurring in a Negro patient is presented. Only 12 per cent of these neoplasms have been found in nonwhite patients. Ultrastructural and histochemical studies indicated that the amorphous, acellular, eosinophilic substance present within the tumor was not amyloid. The presence of only sparse calcifications is an unusual histologic variant. No relationship between neoplasm and reduced enamel epithelium could be demonstrated. ( info) |
8/533. Squamous odontogenic tumor. Report of six cases of a previously undescribed lesion. Six cases of a previously unnamed oral lesion are described and the name squamous odontogenic tumor is applied. The lesion causes radiolucent areas of bone destruction adjacent to the roots of teeth. In one case there were multiple separate lesions. light microscopy revealed numerous islands of benign squamous epithelium with focal areas of keratinization and calcification. Electron microscope examination in one case showed normal squamous epithelial cells with abundant glycogen granules, tonofilaments and myelin bodies. Complete surgical excision seems the best therapy, as only one lesion recurred following treatment. ( info) |
9/533. Adenomatoid odontogenic tumor (adenoameloblastoma). Report of a case. A case of adenomatoid odontogenic tumor in which trauma was apparently a significant causative factor is presented. Consultation with an oral pathologist prevented unnecessary radical surgery. ( info) |
10/533. Adenomatoid odontogenic tumour: a case study with radiographic differential diagnostic considerations. Adenomatoid odontogenic tumours (AOT) are benign, hamartomatous odontogenic lesions that not uncommonly mimic a dentigerous cyst radiographically. Such a case as found involving an unerupted left maxillary canine in a 19-year-old Chinese female is described. The differential diagnosis of some common odontogenic cysts and neoplasms occurring in Malaysians, that may present in a dentigerous relationship to an unerupted tooth is discussed. A brief review of the radiographic literature on AOT is also included. ( info) |