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Radsidebar radiology home department overview faculty residency fellowships neuroradiology   images below require macromedia's flash player to view previous case view other head and neck cases next case neuroradiology case of the week case 502 august 2010 zhengjun liu, md and p-l westesson, md, phd, dds clinical presentation: patient is a 9-year-old girl with right facial bone mass. Imaging findings: a solid slightly calcified mass involving right maxillary sinus. Figures 1 & 2: a solid, slightly calcified mass involving the right maxillary sinus and right alveolar ridge. There is opacification and expansion of right maxillary sinus. There is punctate calcification within the mass. Diagnosis: juvenile ossifying fibroma (pathology proven) discussion: maxillary lesions develop from both odontogenic and nonodontogenic origins and have varying degrees of destructive potential. floridalighttacklecharters.com/thq-buy-generic-viagra-online-cheap-tx/ viagra online best generic viagra online buy viagra online buy generic viagra cheap viagra uk delivery cheap viagra online cheap viagra online buy cheap viagra cheap generic viagra      many lesions that occur in the maxillary have a cyst-like radiographic appearance. These lesions are often difficult to differentiate on the basis of their radiographic features alone. Maxillary lesions may be odontogenic or nonodontogenic.      among odontogenic lesions without mineralization, ameloblastomas, odontogenic keratocysts, and dentigerous cysts can all appear as well-defined, unilocular, well-corticated, lucent lesions that are often associated with the crowns of impacted or unerupted teeth. Most radicular cysts appear as round or pear-shaped, unilocular, lucent lesions in the periapical region.      among odontogenic lesions with mineralization, complex odontomas contain multiple masses of dental tissue and compound odontomas contain multiple teeth or tooth-like structures. Odontogenic myxomas are characterized by lytic osseous changes of varying size, which may be demarcated and expansile or exhibit ill-defined borders.      nonodontogenic lesions that mimic odontogenic lesions include benign fibro-osseous lesions (conventional or juvenile ossifying fibroma, focal or periapical cemento-osseous dysplasia, florid osseous dysplasia), traumatic bone cyst, lingual salivary gland inclusion defect, central giant cell granuloma, brown tumor of hyperparathyroidism, arteriovenous malformation, and mucoepidermoid carcinoma. The clinical and radiographic features of these mandibular lesions help establish a differential diagnosis, although microscopic tissue evaluation is generally necessary to accurately identify the lesion.      ossifying fibromas a.  

Cristina Harris