1/171. A unique case of desmoplastic ameloblastoma of the mandible: report of a case and brief review of the English language literature.A unique case of desmoplastic ameloblastoma is reported from the clinical, radiographic, and histologic viewpoints. The patient was a 56-year-old man who complained of a painless swelling on the buccal aspect of the left mandible. Periapical and panoramic radiographs revealed a rounded, slightly radiolucent area with blurred osteosclerotic margins. Occlusal radiograph and computed tomography images disclosed buccal bone expansion outlined by thinned cortices. Computed tomography images exhibited an enhanced area in the anterior portion of the lesion. Interestingly, the coronal computed tomography images revealed a close relationship between the periodontal membrane of the left mandibular second premolar and the enhanced area. biopsy specimens from the anterior portion of the lesion displayed typical histologic features of the desmoplastic variant of ameloblastoma. However, those from the posterior portion disclosed a large cystic formation. Oxytalan fibers were identified in the stromal tissue of the tumor, which suggested that the tumor arose from the epithelial rests of Malassez in the periodontal membrane of the related tooth. We also reviewed previously reported 41 cases. In 36 of 38 cases in which the location was specified, the tumor was found in the anterior to premolar region of the maxilla or mandible. A radiographic description was given in only 29 previous cases, 28 of which involved multilocular lesions. No cyst as large as the one in the present case was found among the previously reported desmoplastic ameloblastomas. Although the present case deviates from the usual desmoplastic variant of ameloblastoma in terms of locus, radiologic appearance, and cyst formation, it still meets the histologic criteria for this variant in both the stromal and epithelial components.- - - - - - - - - - ranking = 1keywords = mandible (Clic here for more details about this article) |
2/171. ameloblastoma of the maxilla. Case report.A basal cell maxillary ameloblastoma became obvious as an asymptomatic swelling of the left buccal sulcus and alveolar process, although a large extension into the maxillary sinus up to the nasal conchae and the orbital floor had already occurred. The painless and slow growth of the lesion, the thin bone of the upper jaws, the adjacent cavities and the vital structures are the main factors for delay in recognition and thus the potentially lethal result of a maxillary ameloblastoma. A review of location, age, sex and race predilection, clinical course, radiographic appearance, histological types and treatment methods in made.- - - - - - - - - - ranking = 0.0074089577919863keywords = jaw (Clic here for more details about this article) |
3/171. Granular cell ameloblastoma of jaw. A report of rare case and brief review of literature.ameloblastoma is an epithelial odontogenic tumour of the jaw and exhibits diverse microscopic patterns which occurs either singly or in combination with other patterns. The rare granular cell variant is seen in combination usually with follicular or plexiform subtypes. The reported case reveals the microscopic patterns characteristic of granular cell variant only, which is uncommon. The tumour was excised and no recurrence has been observed after nineteen months of surgery.- - - - - - - - - - ranking = 0.037044788959932keywords = jaw (Clic here for more details about this article) |
4/171. Giant ameloblastoma: report of an extreme case and a description of its treatment.ameloblastoma is an odontogenic tumor that usually occurs in the mandible. It is an aggressive but benign tumor of epithelial origin that is rarely metastatic. We report the case of a 53-year-old woman who had a massive ameloblastoma of the mandible. The tumor measured 15.2 x 11.4 x 12.0 cm. The patient had oral bleeding that required a transfusion. The workup included three-dimensional imaging, arteriography, and embolization to control bleeding. Surgical management entailed the resection of the entire left mandible and right symphysis, followed by reconstruction with a free fibular flap. To our knowledge, this is the largest reported ameloblastoma managed with three-dimensional imaging, radical resection, and free-flap reconstruction. This article also reviews aspects of the differential diagnosis, pathology, and management of jaw tumors.- - - - - - - - - - ranking = 0.50740895779199keywords = mandible, jaw (Clic here for more details about this article) |
5/171. Cytology of recurrent ameloblastoma with malignant change. A case report.BACKGROUND: ameloblastoma is a rare tumor of the jaw that arises from the odontogenic epithelium. Ameloblastomas have a propensity for local recurrence and, rarely, for metastasis. The term malignant ameloblastoma is reserved for those metastasizing tumors that retain the typical morphology of ameloblastoma. Fine needle aspiration (FNA) reports on ameloblastomas are scant, and those on malignant ameloblastomas are still more so. CASE: In a case of malignant ameloblastoma diagnosed by FNA cytology, the clinical presentation was that of a malignant neoplasm. FNA smears were highly cellular and showed isolated, scattered cells and small groups of basaloid cells and polygonal squamous epithelial cells. Stellate and spindle-shaped cells were also seen in the background. The cytologic diagnosis was subsequently confirmed on histopathology. CONCLUSION: The characteristic combination of cells in FNA smears facilitated the diagnosis of ameloblastoma. Since the biologic behavior of the tumor was that of a malignant neoplasm, the slides were reviewed. The cytologic smears did not exhibit sufficient features of malignancy to label the lesion malignant.- - - - - - - - - - ranking = 0.0074089577919863keywords = jaw (Clic here for more details about this article) |
6/171. So-called 'hybrid' lesion of desmoplastic and conventional ameloblastoma: report of a case and review of the literature.So-called 'hybrid' lesion of ameloblastoma, which is composed of desmoplastic ameloblastoma and conventional follicular/plexiform ameloblastoma, is an unusual variant of ameloblastoma and only eight cases of 'hybrid' lesion have been published in the English literature. To enhance knowledge of this interesting tumor, we add a case of 'hybrid' lesion that occurred in the right mandible of a 48-year-old Japanese male. Radiographic examination disclosed a honeycomb appearance at the anterior alveolar region, combined with a unicystic radiolucency in the molar region of the mandibular body. Histologically, the former showed microscopic features of desmoplastic ameloblastoma and the latter those of follicular ameloblastoma with focal granular cell transformation. The lesion was enucleated with curettage of surrounding bone and the lesional cavity was marsupialized. Although tumor tissues reappeared at 3, 5, 7 and 14 months after the surgery, the patient has remained disease free for 11 years after the last vaporization by CO2 laser of the recurred tumor. Many more cases of 'hybrid' lesion are needed to clarify the clinicopathological, histopathological and biological characteristics of this interesting variant of ameloblastoma.- - - - - - - - - - ranking = 0.16666666666667keywords = mandible (Clic here for more details about this article) |
7/171. ameloblastoma containing mucus glands.A 53-year-old woman had a large, deforming mass involving the mandible and was treated by subtotal mandibulectomy. Histologically, the mass proved to be an acanthomatous ameloblastoma that contained mucus glands. Eleven years after the mandibulectomy, the tumor has not recurred or metastasized.- - - - - - - - - - ranking = 0.16666666666667keywords = mandible (Clic here for more details about this article) |
8/171. Intraosseous squamous cell carcinoma arising in association with a squamous odontogenic tumour of the mandible.We report a rare occurrence of intraosseous squamous cell carcinoma (SCC) arising in association with a squamous odontogenic tumour (SOT), which had not previously been documented in the literature. A 53-year-old man had, for 5 years, a well-demarcated radiolucency attached to the impacted third molar of the mandible. The enucleated specimen had a characteristic pattern of SOT, but in which a few epithelial islands showed atypical features suggestive of SCC. Intense p53-, proliferating cell nuclear antigen- and Ki-67-positive cells were detected in carcinoma areas. Within 2 months, aggressive bone destruction showing typical findings of intraosseous SCC appeared. The present tumour is presumably a malignant variant of SOT.- - - - - - - - - - ranking = 0.83333333333333keywords = mandible (Clic here for more details about this article) |
9/171. Granular cell ameloblastoma of the jaw. A report of two cases with fine needle aspiration cytology.BACKGROUND: Fine needle aspiration cytology (FNAC) of jaw tumors has not been studied extensively. Ameloblastomas are jaw tumors that show a wide morphologic spectrum and thus may pose some diagnostic difficulties. Of the many types, granular cell ameloblastoma (GCA) is an uncommon variant that possesses distinctive features. To the best of our knowledge, there have been no previous reports on the cytologic findings of GCA. We present two cases diagnosed by FNAC. CASES: Two cases of GCA were diagnosed on cytology and subsequently confirmed on histology. Both patients presented with a large, lytic jaw tumor. FNAC smears showed characteristic granular cells along with spindle and basaloid cells. CONCLUSION: Although GCAs are rare tumors, they possess distinctive features that permit an accurate diagnosis, provided that this entity is kept in mind. This tumor has to be differentiated from cystic odontogenic lesions, epulis and granular cell myoblastoma. An accurate preoperative diagnosis also helps the surgeon to plan more extensive surgery as these tumors show a great propensity for malignant change and metastases.- - - - - - - - - - ranking = 0.051862704543904keywords = jaw (Clic here for more details about this article) |
10/171. Ameloblastic fibroma: report of case.A 3-year-old girl had a large, painless, radiolucent lesion that involved the right side of the mandible. The lesion extended from the canine region to the condyle and coronoid process. A microscopic diagnosis of ameloblastoma was made by the hospital pathologist. Because it is unusual to find an ameloblastoma in a 3-year-old child and because the extensive surgical procedure that would be necessary to remove an ameloblastoma of this size, further consultation was required. As a result, the lesion was diagnosed as an ameloblastic fibroma and a more conservative surgical procedure was performed. Sixteen months after surgery, radiographic evidence showed complete resolution of the bony surgical defect, with no evidence of recurrence. This case once again points out the necessity for exact diagnosis of similar histologic lesions that may require a different approach in treatment.- - - - - - - - - - ranking = 0.16666666666667keywords = mandible (Clic here for more details about this article) |
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