Space-Occupying Processes of Paranasal Sinuses
According to Hommerich (1964) malignant tumors of paranasal sinuses account for 10%–13% of the otorhinolaryngologic malignancies and for 0.2% of malignancies overall. These tumors are usually diagnosed late, since in view of the mild symptoms patients tend to not see the physician early. Vollrath and Lasch (1988) detected stage III or IV tumors in 75% of his 61 patients. Since precise diagnosis of these tumors is not always easy, even given the case history and symptoms, a team including an ophthalmologist, a radiologist and a neurologist is needed.