Primary malignant lymphoma of the cavernous sinus--case report.

A 59-year-old female presented with a very rare case of primary malignant lymphoma of the cavernous sinus manifesting as diplopia and right facial hypesthesia. Magnetic resonance (MR) imaging showed the tumor located in the right cavernous sinus as low intensity with marked enhancement by gadolinium. The tumor was partially removed by the transzygomatic extradural approach. The histological diagnosis was malignant lymphoma. Chest and abdominal computed tomography and gallium-67 scintigraphy revealed no other lesions in the body. The patient received conventional radiotherapy and her diplopia and right facial hypesthesia gradually improved. At 1 month after radiotherapy, MR imaging showed no evidence of residual tumor. Primary cavernous sinus malignant lymphoma is extremely rare, but should be considered in the differential diagnosis of cavernous sinus lesions. Histological confirmation of tumors in this region is essential for choosing the most appropriate treatment to achieve a better outcome.