1/545. pneumocephalus associated with ethmoidal sinus osteoma--case report.A 35-year-old female suffered sudden onset of severe headache upon blowing her nose. No rhinorrhea or signs of meningeal irritation were noted. Computed tomography (CT) with bone windows clearly delineated a bony mass in the right ethmoid sinus, extending into the orbit and intracranially. Conventional CT demonstrated multiple air bubbles in the cisterns and around the mass in the right frontal skull base, suggesting that the mass was associated with entry of the air bubbles into the cranial cavity. T1- and T2-weighted magnetic resonance (MR) imaging showed a low-signal lesion that appeared to be an osteoma but did not show any air bubbles. Through a wide bilateral frontal craniotomy, the cauliflower-like osteoma was found to be protruding intracranially through the skull base and the overlying dura mater. The osteoma was removed, and the dural defect was covered with a fascia graft. Histological examination confirmed that the lesion was an osteoma. The operative procedure resolved the problem of air entry. CT is superior to MR imaging for diagnosing pneumocephalus, by providing a better assessment of bony destruction and better detection of small amounts of intracranial air.- - - - - - - - - - ranking = 1keywords = cavity (Clic here for more details about this article) |
2/545. craniopharyngioma invading the nasal and paranasal spaces, and presenting as nasal obstruction.A case of craniopharyngioma invading the nasal and paranasal sinuses and presenting as nasal obstruction is reported. Imaging showed a destructive mass of the skull base with involvement of the nose and paranasal sinuses. In the excised mass mitoses were frequent and the proliferation index was high. Invasion of the nasopharynx and presentation as a nasopharyngeal mass is uncommon for a craniopharyngioma.- - - - - - - - - - ranking = 82.414131912339keywords = nasal (Clic here for more details about this article) |
3/545. Primitive neuroectodermal tumor in sinonasal region.An elderly woman having a nasal tumor diagnosed as alveolar rhabdomyosarcoma was referred to our hospital. Histological reexamination of the patient revealed that the tumor was composed of lobules of compactly arranged small round atypical cells. The atypical cells contained large oval to round vesicular nuclei, and scanty cytoplasm showing PAS positive glycogen material. The tumor cells were immunohistochemically positive for NSE, S-100 protein and vimentin, but showed negative reaction for myoglobin, desmin, EMA, keratin, LCA, chromogranin and MIC2. Ultrastructurally, the tumor cells contained a few cluster of glycogen particles and less organellae and filaments, and there were no cytoplasmic processes, neurosecretory granules or neurofilaments. Pathological findings suggested primitive neuroectodermal tumor resembling extraskeletal Ewing's sarcoma, but negative reaction for MIC2 immunohistochemically could not ascertain the diagnosis. Location of the tumor and age of the patient of the present case were unusual.- - - - - - - - - - ranking = 25.754416222606keywords = nasal (Clic here for more details about this article) |
4/545. Epithelial-myoepithelial carcinoma: An unusual tumor of the paranasal sinus.A 65-year old woman presented with nasal obstruction and on examination was found to have a huge mass in the maxillary sinus. This was removed, and histological examination revealed a mixture of trabecular structures consisting of inner dark cells, outer clear cells and solid structures consisting of only clear cells. Immunohistochemical examination showed the clear cells to be positive for alpha-smooth muscle actin. Ultrastructural examination confirmed the myoepithelial cell origin. The characteristic morphological, immunohistochemical and ultrastructural features aided in the diagnosis of epithelial-myoepithelial carcinoma.- - - - - - - - - - ranking = 25.754416222606keywords = nasal (Clic here for more details about this article) |
5/545. radium-induced malignant tumors of the mastoid and paranasal sinuses.In the records of 5,058 persons with therapeutic or occupational exposure to radium, 21 patients with carcinoma of the mastoid and 11 with malignant tumors of the paranasal sinuses were identified. Tumor induction times were 21-50 years for mastoid tumors (median, 33) and 19-52 years for paranasal sinus tumors (median, 34). Dosimetric data are given for the patients whose body burdens of radium have been measured. We found a high proportion of mucoepidermoid carcinoma, comprising 38% of the mastoid and 36% of the paranasal sinus tumors. Three patients had antecedent bone sarcoma at 20, 11, and 5 years, respectively, and a bone sarcoma was discovered at autopsy in a fourth patient. Radiographic changes in the mastoid and paranasal sinuses were similar to those seen in nonradium malignant tumors. More than 800 known persons exposed to radium before 1930 and another group of unknown size who received radium water or injections of radium from physicians are still alive and at risk of developing malignant tumors of the mastoid and paranasal sinuses.- - - - - - - - - - ranking = 46.357949200691keywords = nasal (Clic here for more details about this article) |
6/545. Fibrous dysplasia and ossifying fibroma of the paranasal sinuses.Fibro-osseous lesions involving the paranasal sinuses, the mid-face and anterior skull base are uncommon. In addition, there appears to be no clear pathological or clinical classification that embraces the variety of lesions that exhibit such diverse pathological and clinical behaviour, yet may still be referred to as a fibro-osseous lesion. The diagnosis of fibrous dysplasia and ossifying fibroma is made on a combination of clinical, radiological and pathological criteria. This paper emphasizes the clinical and pathological differences between fibrous dysplasia and ossifying fibroma. The more aggressive clinical behaviour of the latter is highlighted and a more radical surgical approach is recommended. In contradistinction, fibrous dysplasia can exhibit a more benign behaviour and radical surgery is not always justified. A clinicopathological distinction between these two conditions is important from a management perspective despite the fact that they both may be encompassed under the 'umbrella' term fibro-osseous lesion.- - - - - - - - - - ranking = 25.754416222606keywords = nasal (Clic here for more details about this article) |
7/545. Primitive sinonasal malignant mucosal melanoma: description of a case treated with radiotherapy (0-7-21 regimen).Mucosal malignant melanoma (MMM) of the nasal cavity and paranasal sinuses is rare and has a poor prognosis. The rarity of MMM of the ethmoid is also noteworthy and primary treatment has been, till now, surgery and/or radiotherapy (RT). Here we report a case of MMM arising in the ethmoid of a caucasian man and treated with hypofractionated RT. A 32 year-old man presented with symptoms of cephalalgia, obstruction and nasal bleeding; a computed tomography (CT) showed a large mass that involved ethmoid, left orbit and roof of the nasal cavity. After biopsy, a MMM was found. Chest radiography demonstrated the presence of multiple lung metastases and still the patient was submitted to palliative radiotherapy according to 0-7-21 regimen with a total dose of 24Gy/3 fraction/21dd, dose per fraction 8Gy. The patient was asymptomatic one month after the end of RT and three months later a CT demonstrated a partial remission. The patient died 17 months after the initiation of RT for disseminated disease, without clinical signs of tumoral regrowth in the irradiated site. This case confirms the efficacy and the safety of 0-7-21 RT regimen; the absence of symptoms after 17 months and the poor prognosis encourage the use of RT as primary treatment for MMM of the head and neck.- - - - - - - - - - ranking = 409.70038059665keywords = nasal cavity, nasal, cavity (Clic here for more details about this article) |
8/545. Sinonasal mucosa-associated lymphoid tissue lymphoma.Mucosa-associated lymphoid tissue (MALT) is a specialized form of lymphoid tissue that may be acquired at sites in response to chronic inflammation. Most low-grade, B-cell, non-Hodgkin lymphomas that occur at extranodal sites derive from acquired MALT. Confusing and overlapping terms have been used to describe these lymphomas, but immunohistochemical advances now allow more precise subtyping. Our review of the literature yielded only 2 previous reports of sinonasal MALT-derived lymphoma, and we report an additional case in a patient with a history of chronic sinusitis. Current developmental theories of MALT-derived lymphomas are discussed. In addition, we review the clinical, histologic, and immunophenotypic features of MALT-derived lymphomas.- - - - - - - - - - ranking = 25.754416222606keywords = nasal (Clic here for more details about this article) |
9/545. ethmoid sinus osteoma presenting as epiphora and orbital cellulitis: case report and literature review.Paranasal sinus osteoma is a slow-growing, benign, encapsulated bony tumor that may be commonly asymptomatic, being detected incidentally in 1% of plain sinus radiographs or in 3% of sinus computerized tomographic scans. In a patient presenting with orbital cellulitis and epiphora, computed tomography disclosed a large osteoma of the ethmoid sinus. Excision of the osteoma allowed recovery of vision, return of extraocular muscle function, and resolution of choroidal folds. Proptosis, diplopia, and visual loss are other frequent presenting signs of paranasal osteomas. epidemiology, diagnosis, treatment, and pathologic findings in paranasal sinus osteoma are reviewed.- - - - - - - - - - ranking = 15.452649733564keywords = nasal (Clic here for more details about this article) |
10/545. Congenital nasal hemangiopericytoma: intrauterine, intraoperative, and histologic findings.hemangiopericytoma is a rare tumor of mesenchymal origin. To date, 91 cases of nasal or paranasal hemangiopericytoma and 59 congenital hemangiopericytomas have been reported in the literature. A congenital hemangiopericytoma arising from the nasal cavity and skull base has not yet been described. We report a case of a male newborn with a highly vascular nasal tumor diagnosed by in utero sonography with three-dimensional surface reconstruction. The tumor extended to the right anterior skull base, the right nasal cavity, and the right side of the nasal pyramid. A complete resection by neodymium:yttrium-aluminum-garnet-potassium titanyl phosphate ("Nd:YAG-KTP") laser was performed on the day of cesarean section at 33 weeks' gestation. The tumor was diagnosed as hemangiopericytoma by histologic and immunohistochemical findings. Postoperative nasal flow, feeding, and sight were unimpaired. At the 9-month follow-up, the infant remained free of disease.- - - - - - - - - - ranking = 425.15303033021keywords = nasal cavity, nasal, cavity (Clic here for more details about this article) |
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