Osteoma of nasal cavity and paranasal sinuses .
- A benign slow-growing lesion consisting of well-differentiated neoplastic bone tissue
- Most osteomas are asymptomatic and are found incidentally during radiographic examination
- Most osteomas occur in the frontal sinus, followed by ethmoid cells and maxillary sinus
- Surgical removal takes place only if the lesions are symptomatic
