Browsing by Subject "Paranasal Sinus Neoplasms"

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    Inverted papilloma with new bone formation: Report of three cases
    (2007) Unlu H.H.; Songu M.; Ovali G.Y.; Nese N.
    Background: An inverted papilloma (IP) is a benign sinonasal tumor of ectodermal origin, which is locally aggressive and destructive, tends to recur if incompletely removed, and has significant malignant potential. On CT scan, the appearance of an IP is variable and nonspecific but most commonly it appears to have soft tissue density. The association of IPs and new bone formation is extremely rare; to the best of our knowledge, only one case has been reported in the literature to date. Methods: We report three cases with existence of bony mass surrounded by polypoid soft tissue diagnosed as IP histopathologically. Results: The nature, shape, and location of the bony mass were not in concordance with trapped bone, with tumoral calcifications, or with osteoma. Conclusion: We propose that with regard to the three cases presented here, new bone formation may be associated with IP pathologically. We also believe that additional investigations are required to characterize the pathophysiological mechanisms involved in neoplasm-induced osteogenesis. Copyright © 2007, OceanSide Publications, Inc.
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    Frontal sinus osteoma complicated with intracranial inflammatory polyp: A case report and review of the literature
    (2009) Umura S.; Gunhan K.; SonguM; Temiz C.; YuceturkAV
    Background: Osteomas of the paranasal sinuses rarely cause intracranial manifestations. A neurological symptom may be the first sign of a previously unrecognized osteoma. Case description: A 28-year-old male was referred with one episode of witnessed tonic-clonic seizure and loss of consciousness. Radiologic examination revealed a calcific mass in the frontal sinus and a cystic structure was detected in the posterior component of the lesion. The patient underwent a combined nasal endoscopic approach and a bilateral frontal osteoplastic craniotomy. The ossifying tumoral tissue and the polypoid soft tissue mass were removed. The histo-pathologic diagnosis of the hard, bony tumor was consistent with an osteoma and the polypoid soft tissue was an inflammatory polyp. Conclusion: This case report illustrates a rare and life threatening complication of a frontal sinus osteoma with an intracranial extension of an inflammatory polyp.
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    Sinonasal-type haemangiopericytoma: A case report; [Sinonazal tip hemanjioperisitom: Bir olgu sunumu]
    (Federation of Turkish Pathology Societies, 2015) Uğur Duman F.; Ayhan S.; İşisağ A.; Eskiizmir G.; Tarhan S.
    Sinonasal-type hemangiopericytomas, which comprise less than 0.5% of all sinonasal neoplasms, arise unilaterally in the nasal cavity as polypoid masses with a mean diameter of about 3 cm. A 34-year-old female patient was admitted due to nasal obstruction and epistaxis. A polypoid mass covered with intact mucosa that originated both from the right inferior concha and lateral nasal wall was detected by nasal endoscopy. The tumor, extending from the oropharynx to the nasopharynx, was measured as 3,5×3×2 cm. Although exhibiting characteristic histopathological features and typical clinical symptoms, this case with unexpected immunohistochemical findings can provide a viewpoint on the nature of this kind of tumors. © 2015, Federation of Turkish Pathology Societies. All rights reserved.