Abstract
We experienced a patient with sphenoid sinus metastasis from prostatic adenocarcinoma. A 75-year-old man suffering from diplopia for one month was diagnosed as having left abductor paralysis by an ophthalmologist. He was referred to our department, because the cause of the left abductor paralysis was suspected as being due to opacification at the bilateral sphenoid sinus seen on CT imaging. We performed a nasal septoplasty and endoscopic sinus surgery (ESS) under local anesthesia. A reddish brown tumor in the sphenoid sinus was bilaterally observed during surgery. The tumor was histologically diagnosed as an adenocarcinoma metastasized from prostatic cancer. The left abductor paralysis gradually improved following treatment by medical oncologists after chemotherapy using docetaxel. Sinonasal CT imaging also showed a reduction of the tumor volume in the sphenoid sinus lesion. However, the patient re-presented with right facial palsy in the seventh month after surgery. Finally, he died of respiratory dysfunction caused by metastatic cancer to the lung.
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