CONCLUSION
MRI is generally useful for diagnosing a malignant lymphoma of the
paranasal sinuses. However, in cases with severe necrosis, it may result
in the misdiagnosis of these lymphomas as an inflammatory disease;
therefore, the imaging results should be interpreted carefully. An
endoscopic biopsy should be considered during the early stages in cases
where a malignant lymphoma cannot be definitively ruled out.