This report presents a case of giant osteoma of the right frontal and ethmoidal sinus, nasolacrimal duct and orbit in a patient with history of trauma, investigated using the computed tomography technique. The epidemiology, aetiology, diagnostic methods and treatment of the paranasal sinus osteoma have been reported, as well as discussed with the recently published data pertaining to the subject. The advantages of using computed tomography for detailed diagnosis of morphological features of the pathological changes, as well as their precise localization, have also been presented.