1/7. CT and MRI of congenital sinonasal ossifying fibroma.We report a 9-year-old boy with a sinonasal ossifying fibroma, probably congenital, with atypical findings on CT and MRI. CT revealed a soft-tissue density mass in the sphenoethmoidal sinuses, nasal cavity and right maxillary sinus with a few foci of calcification and with remodelling and destruction of the adjacent facial bones. MRI showed high signal on T2- and intermediate signal on T1-weighted images. A thin, partly enhancing outer shell and some nonenhancing septa were visible on contrast-enhanced images. MRI also showed the tumour to extend into the anterior cranial fossa. Subtotal removal was performed. We compare our findings with reports in the literature and discuss the differences from fibrous dysplasia.- - - - - - - - - - ranking = 1keywords = cavity (Clic here for more details about this article) |
2/7. Ossifying fibroma arising in the right ethmoid sinus and nasal cavity.Ossifying fibroma, a rare tumor entity, is a well-demarcated benign fibro-osseous tumor composed of bone, fibrous tissue and cementum. It is commonly found in the mandible, but also found in the maxilla and paranasal sinuses. Simple curettage is enough when the fibrous lesions are located in the mandible but a complete en bloc excision is required when these lesions are located in the maxilla and paransal sinuses to relieve symptoms and prevent recurrence. With the advent of sinonasal endoscopy in the mid 1980s, and subsequent advances in surgical techniques, endoscopic management of the fibrous-osseous lesions has become possible. In the current case study, we report a successful endoscopic removal of a huge ossifying fibroma located in the right ethmoid sinus and nasal cavity.- - - - - - - - - - ranking = 5keywords = cavity (Clic here for more details about this article) |
3/7. Ossifying fibroma of the middle turbinate: a case report.Ossifying fibromas (OFs) are rare, benign, nonaggressive fibroosseous tumors that are commonly seen in head and neck region. They show aggressive pattern when the midface and paranasal sinuses are involved. We report a 28-year-old woman with OF of the middle turbinate. Computed tomography images of the nasal cavity showed monostotic hyperdense lesion confined to middle turbinate. En bloc excision was performed. Histological examination confirmed the diagnosis as OF. Our case is of particular interest because it is, to our knowledge, the first documented case of OF arising from the middle turbinate.- - - - - - - - - - ranking = 1keywords = cavity (Clic here for more details about this article) |
4/7. Juvenile psammomatoid ossifying fibroma of the neurocranium. Report of four cases.Juvenile psammomatoid ossifying fibroma (JPOF) is a benign fibroosseous lesion predominantly arising within the paranasal sinuses in children and young adults. Neurocranial occurrence is exceedingly rare and a location within the neurocranial portion of the temporal bone has not been described. The authors report on one case of sinonasal JPOF secondarily extending into the cranial cavity and three cases primarily affecting the neurocranial bones to increase clinical awareness of this uncommon tumor, which may be easily mistaken for meningioma. Moreover, the absence of activating missense mutations of the GNAS1 gene in two cases strongly argues against a relationship between JPOF and fibrous dysplasia.- - - - - - - - - - ranking = 1keywords = cavity (Clic here for more details about this article) |
5/7. An ossifying fibroma presenting as Stafne's idiopathic bone cavity.The purpose of this paper is to present a case of a fibro-osseous lesion which was diagnosed as an ossifying fibroma rather than a cemento-ossifying fibroma because of its location away from the tooth bearing parts of the jaw and the absence of cemental tissue in the excised specimen. Its location and features on a panoramic radiographic made Stafne's idiopathic bone cavity a possible diagnosis.- - - - - - - - - - ranking = 5keywords = cavity (Clic here for more details about this article) |
6/7. Benign fibroosseous lesions involving the skull base, paranasal sinuses, and nasal cavity. Report of two cases.The authors report two patients with benign fibroosseous lesions involving the center of the skull base: a 15-year-old boy with repetitive meningitis and pneumocephalus and a 11-year-old boy with nasal obstruction and headache. The clinical diagnoses were ossifying fibroma and aneurysmal bone cyst, respectively. Lesions in both patients extended to the nasal cavity, the sphenoid and posterior ethmoid sinuses, and the skull base, where the planum sphenoidale, the sella turcica, the upper two-thirds of the clivus, and the medial portion of the middle cranial base were involved. The lesions were totally removed using an anterior craniofacial approach. Characteristics of these lesions and the surgical approach are discussed.- - - - - - - - - - ranking = 5keywords = cavity (Clic here for more details about this article) |
7/7. Ossifying fibromyxoid tumor resembling parosteal osteosarcoma.Ossifying fibromyxoid tumor (OFMT) is a rare soft tissue neoplasm which varies in the amount of bone tissue laid down. We report on a case of OFMT in a 59-year-old male which mimicked a large parosteal osteosarcoma on radiography, MRI, and CT. T1-weighted MR images showed high-intensity areas which reflected fatty marrow. The metaplastic bone was connected to the cortex of the femur, but the tumor did not involve the medullary cavity. The tumor was irradiated and the patient was administered chemotherapy. Wide excision of the tumor and hip rotation plasty was performed. The patient has been disease free for 18 months.- - - - - - - - - - ranking = 1keywords = cavity (Clic here for more details about this article) |