Imaging of Sinonasal Malignant Lymphoma.

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Two patients with primary malignant lymphoma (non-Hodgkin's lymphoma) extending bilaterally into nasal cavities and paranasal sinuses were examined by plain X-ray films, CT, and MRI.Plain X-ray films showed diffuse, uniform bilateral opacification of ethmoid cells and maxillary sinuses, which might lead to a misdiagnosis of chronic sinusitis. The only abnormal finding was bone destruction of the medial orbital rim; it was considered very important not to overlook this finding to avoid misdiagnosis.Moth-eaten or permeating bone destruction of the nasal septum was found on CT and confirmed by MRI, which showed several very low intensity (no signal) regions dotted along the nasal septum. We conclude that less marked bony wall destruction and apparent mass formation on both sides of the bony wall are characteristic findings of sinonasal malignant lymphoma.
耳鼻咽喉科臨床学会の論文