-To remind the radioanatomy of the sinonasal cavities.
-To evaluate the central role of CT and MRI imaging in the management of benign and malignant sinonasal tumors.
-To describe the deep sinonasal tumors extension on imaging.
Many benign and malignant sinonasal tumours have been described.
sinonasal tumours are rare,
and sinonasal cancers represent less than 5% of head and neck tumors and less than 1% of all malignancies,
with a peak incidence in the 5th to 7th decades and with a male preponderance.
The early symptoms and imaging findings of sinonasal tumours are similar to rhinosinusitis.The are neglected both by the patients and doctors.
At the time of correct diagnosis,
more than half of the tumours have reached an advanced...
Findings and procedure details
I Benign tumors
Osteomas are most common within the frontal sinuses followed by the ethmoid sinuses and rarely involve the maxillary or sphenoid sinuses .
This benign intraosseous proliferation of mature bone arises from the sinus wall,
is nearly always limited to the sinus contour but can be a source of spontaneous cerebrospinal fluid rhinorrhea and pneumocephalus,
often related to a defect of the ethmoid complex or sphenoid sinus .Multiplanar CT imaging is the best modality to evaluate their relationship to thesinsu wall.
Tumors and tumor-like lesions are rare diseases in the paranasal sinuses.
Malignant sinonasal tumors are the most frequent facial malignancies in adults.
Assessment of these tumors requires a multidisciplinary approach and imaging plays a major role to define the precise tumor location,
volume and extension and to plan post-treatment follow-up.
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