Diagnostic imaging: the key for a precise diagnosis of ORL: Nasal and paranasal lesions; differentiating malignant tumors from benign lesions

Abstract The different modalities of malignant tumor invasion were presented and discussed. When determining the extent of malignant tumor invasion, it is useful to assess surrounding tissues such as bone marrow, fat tissues, and nerves. In addition, qualitative diagnoses can be made based on such information as the location of bony destruction as well as the preservation of maxillary sinus mucosa. We reviewed diseases having characteristic magnetic resonance imaging (MRI) findings. These findings are useful for distinguishing between malignant and benign lesions that occur in the nasal and paranasal sinuses.