ABSTRACT
Osteomas are benign slowly growing tumors containing mature compact or cancellous bone. The development of multiple osteomas precedes the development of multiple colonic polyposis in patients with Gardner’s syndrome. The cysts form as a result of fluid accumulation around the crown of an unerupted tooth. Dentigerous cysts can present as expanding masses and may lead to facial asymmetry. Hemangiomas are benign vascular lesions composed of vascular channels of varying size. Angiofibromas are histologically benign vascular, but highly aggressive, lesions of the nasal cavity consisting of fibrous tissue with intermixed thin-walled vessels. Inverting papillomas are benign lesions composed of hyperplastic squamous epithelium with an endophytic growth pattern. They commonly arise from the lateral nasal wall in the vicinity of the middle turbinate. The radiological features of Wegener’s granulomatosis initially appear similar to those of chronic inflammatory disease, with mucosal thickening in the sinonasal cavity.
