1/18. Well-differentiated intraosseous osteosarcoma of the jaws: experience of two cases from the Instituto Nacional de Cancerologia, mexico.Osteosarcomas of the jaws represent less than 10% of all osteosarcomas, and most of them are high-grade neoplasms. Prognostic factors in overall survival include tumor size, location and histologic grade. Examples of well-differentiated (low-grade) intraosseous osteosarcomas of the jaws (WDIOJ) have been rarely reported. This article presents two cases of this unusual lesion, one of which was located in the maxilla of a 17-year-old man and the other developed in the mandible of a 37-year-old woman. CT scan was necessary to detect the small foci of penetration into the thinned cortical bone and the reactive periosteal bone formation, which are important findings to establish the correct diagnosis of WDIOJ and help to exclude other benign intraosseous lesions that may be very similar histologically, such as fibrous dysplasia, ossifying and desmoplastic fibromas. In spite of tumor size (mean 5.2 cm), their well-demarcated borders allowed complete removal of both tumors. There is no evidence of tumoral activity in any of our patients after follow-up periods of 15 months and 5 years. Wide excision seems to be the treatment of choice for this subgroup of osteosarcomas.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
2/18. Clear-cell odontogenic carcinoma with pulmonary metastases resembling pulmonary meningothelial-like nodules.Clear-cell odontogenic carcinoma (CCOC) is a rare neoplasm with malignant potential and unknown cytogenetic alterations. We describe the case of a 43-year-old woman who presented with an unusual odontogenic epithelial tumor. Histologically, the tumor was composed of clear-cell areas and exhibited a squamous pattern with little nuclear pleomorphism similar to benign squamous odontogenic tumor. Multiple small pulmonary nodules occurring 3 years after primary surgical treatment histologically closely resembled benign minute pulmonary meningothelial-like nodules (MPMN) with clear-cell features. comparative genomic hybridization (CGH) and immunohistochemistry, performed as diagnostic adjuncts, revealed in the odontogenic tumor and the pulmonary lesions a very similar pattern of chromosomal aberrations (loss of 9, gains of 14q, 19 and 20 in both, and additional loss of 6 in the odontogenic tumor) and the same pattern of expression (positive for cytokeratin 5, 6, 8, 19 and negative for cytokeratin 18, epithelial membrane antigen, and vimentin), differing from that of MPMN. These findings confirmed the final diagnosis of metastasizing CCOC with partial squamous differentiation, substantiated the unfavorable prognosis of the clear-cell component, and highlighted the diagnostic impact of CGH and immunohistochemistry for classification of these morphologically peculiar pulmonary CCOC metastases.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
3/18. Successful management of solitary malar metastasis from lung cancer.A right malar mass developed in a 68-year-old man who had undergone right upper and middle bilobectomy for lung cancer 2 years previously. The mass was diagnosed to be a malar metastasis from lung cancer and was surgically resected because no other metastases were found. The patient is well without signs of recurrence 5 years after resection of the malar mass. This is the first report of a malar metastasis from lung cancer and of successful resection for malar metastasis.- - - - - - - - - - ranking = 0.40616592700571keywords = cancer (Clic here for more details about this article) |
4/18. Odontoameloblastoma. Clinico-pathologic study of three cases and critical review of the literature.The odontoameloblastoma (OA), is an infrequent neoplasm. To date, there are less than 50 cases reported as OA or ameloblastic odontoma in the English dental literature, but only 14 (including three of our own material), fulfill the histological criteria of the current WHO histological classification of odontogenic tumours. Nine occurred in men and five in women (male to female ratio 1.8:1). Age ranged from 2 to 50 years (mean 20.2 years), and nine cases (64.2%) were diagnosed during the first two decades. Maxilla and mandible were equally involved, and most cases occurred posterior to the canines (71.4%). Follow-up ranged from 6 months to 8 years (mean: 25.5 months). Of the 12 cases with informed follow-up, two recurred once (at 24 and 18 months, respectively), and one case had two documented recurrences, at 6 and 49 months. Although OA tends to occur at an earlier age than conventional ameloblastoma, it has practically the same potential to produce bone expansion, root resorption and recurrence. For these reasons OA should be treated in a similar fashion, with wide surgical excision and close follow-up for at least 5 years.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
5/18. Oronasal reconstruction with local mucoperiosteal and free latissimus dorsi flaps.We describe the use of maxillary sinus mucoperiosteum as a pedicled flap to reconstruct the floor of the nose following resection of cancer involving the palate, buccal mucosa, and mandible. Complete inferior turbinectomy allows access to the roof of the maxillary sinus to harvest the mucoperiosteum as a vascularized flap pedicled under the remaining middle turbinate. A free latissimus dorsi myocutaneous flap suspended from the floor of the orbit and nasal septum is then used to obliterate the maxillary sinus, reconstruct the palate, and support the floor of the nose. A reconstruction employing this combination of flaps is presented, including postoperative endoscopic intranasal photography and magnetic resonance imaging. Despite the elevated level of the floor of the nose and the absence of the inferior turbinates, rhinomanometry performed 3 months postoperatively demonstrates adequate nasal airflow with normal responses to nasal decongestants.- - - - - - - - - - ranking = 0.058023703857958keywords = cancer (Clic here for more details about this article) |
6/18. Cilengitide (EMD 121974) arrests the growth of a heavily pretreated highly vascularised head and neck tumour.The suppression and eradication of malignant tumours by targeting the endothelial cells of the tumour is one of the rapidly evolving new approaches to cancer therapy. head and neck tumours, because of their high levels of vascularization, present themselves as ideal candidates for such antiangiogenic strategies. We report a heavily pretreated patient with a tumour 15 cm in diameter representing fourth relapse of squamous cell carcinoma, which had its origin in the upper left jaw. The patient was treated with the antiangiogenetic, cyclic peptide, EMD 121974 [cilengitide] (600 mg/m2 over 60 minutes i.v.) on day 1 and 4 in combination with gemcitabine (1000 mg/m2 over 30 minutes) administered days 1 and 8 every 3 weeks for five months, and a partial remission was achieved. This resulted in a clinical improvement in the ability of the patient to eat and smell. The patient remained stable for 12 months on cilengitide mainenance therapy, with no tendency towards spontaneous bleeding. This clinical case demonstrates the clinical efficacy of the antiangiogenetic agent cilengitide, in combination with gemcitabine, in inhibiting rapid growth of highly vascularized tumour and highlights the potential of this new therapeutic agent- - - - - - - - - - ranking = 0.058023703857958keywords = cancer (Clic here for more details about this article) |
7/18. Calcifying epithelial odontogenic (Pindborg) tumor. A clinical case.Calcifying epithelial odontogenic tumor (CEOT), Pindborg tumor, is a rare benign odontogenic neoplasm representing about 0.4-3% of all odontogenic tumors. This tumor more frequently affects adults in an age range of 20-60 years, with a peak of incidence between 40 and 60 years. About 190 cases of CEOT have been reported in the dental literature. Fifty-two percent of cases of CEOT is associated with a tooth impacted and/or displaced by the tumor. The primary CEOT has a recurrence rate of 10-15%, after total excision, and its malignant transformation is a very rare occurrence. The authors report a case of primary intra-osseous CEOT, embedding the mandibular right second molar, in a 24 year-old male. Radiographs showed a well-defined unilocular osteolytic lesion, swelling and reabsorbing the mandible and displacing the inferior alveolar nerve. It was possible to perform conservative surgical treatment consisting of the enucleation of the tumor together with a portion of tumor-free bone cavity margin and the debridement of the inferior alveolar neuro-vascular bundle, which was surrounded by a tumor capsule-like structure. The postoperative histological examination of the tumor revealed typical benign features. The differential diagnosis and work-up of the tumor treatment are discussed in relation with its histological typing and localization in the jaws.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
8/18. Cytologic findings in calcifying epithelial odontogenic tumor: a case report.BACKGROUND: Calcifying epithelial odontogenic tumor (CEOT), or Pindborg's tumor, is a rare, benign, odontogenic neoplasm first described by Pindborg in 1955. It is most commonly seen in the fourth and fifth decades of life, usually arises in the mandibular premolar-molar areas and accounts for approximately 1% of all intraosseous odontogenic tumors. This report describes the cytologic findings in a case of CEOT. CASE: A 62-year-old woman was referred to the ear, nose and throat clinic with a right maxillary mass. The fine needle aspiration (FNA) smears showed numerous calcifications; amorphous, eosinophilic material; and clusters of round epithelial cells embedded in a bloody background. The smears were diagnosed as suspicious for malignancy. Maxillectomy was done. The histologic sections were diagnosed as CEOT. CONCLUSION: FNA findings of calcifying epithelial odontogenic tumor have been described rarely. The clusters of epithelial cells with prominent nucleoli are mistaken for features of a malignant tumor.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
9/18. Desmoplastic fibroma of the jaw: a case report and review of literature.Desmoplastic fibroma is a benign intraosseous neoplasm that is recognized as the intraosseous counterpart of soft tissue fibromatosis in both gnathic and extragnathic sites. It has a propensity for locally aggressive behavior and local recurrence. In the present report, we define the clinicopathological and radiographic features of a desmoplastic fibroma of the mandible in an 8-year-old white boy who initially presented with a 2-month history of a rapidly expanding, painless mass along the right inferior border of his mandible. A critical and comprehensive review of the English language literature is also provided.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
10/18. osteoblastoma of the maxilla and mandible: a report of 24 cases, review of the literature, and discussion of its relationship to osteoid osteoma of the jaws.osteoblastoma is a benign neoplasm of bone characterized by a proliferation of osteoblasts forming bone trabeculae set in a vascularized fibrous connective tissue stroma. We report 24 examples of this neoplasm arising in the maxilla and mandible and compare the clinical and radiographic characteristics of this neoplasm to 53 previously reported examples of osteoblastoma and osteoid osteoma in the jaws. Our results reveal more females reported in the new examples of osteoblastoma than in the previously reported examples of osteoblastoma and osteoid osteoma. This raises the overall female percentage from 47.2% to 58.4%. In addition, significantly fewer patients reported pain, tenderness, and discomfort associated with their neoplasms than in previously reported cases. When all cases are combined, a predominant trend is observed whereby osteoblastoma occurs predominantly on the left side of the posterior mandible and is associated with pain, tenderness, and discomfort. We also provide a rationale for use of the term "osteoblastoma" for any benign osteoblastic neoplasm arising in the jaws.- - - - - - - - - - ranking = 5keywords = neoplasm (Clic here for more details about this article) |
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