[A Case of Choroidal and Brain Metastases from Castration-Resistant Prostate Cancer].

Choroidal and central nervous system metastases from prostate cancer are extremely rare. We report a case of choroidal and brain metastases from castration-resistant prostate cancer (CRPC). A 75-year-old male patient with metastatic CRPC presented with a 1-week history of a decrease in visual acuity in his left eye. An ophthalmoscopic examination revealed a choroidal tumor, 4 disc diameters across with serious retinal detachment. He was diagnosed with metastatic choroidal tumor from examination and patient's background. The external beam radiation therapy of total 30 Gy was successful and his visual acuity was improved. Three courses of chemotherapy with docetaxel (55 mg/m2) were performed, but finally he was found to have multiple brain metastases 4 months later. His headache disappeared after palliative whole brain radiotherapy, but he died 3 months after diagnosis of brain metastases. Although choroidal and brain metastases from prostate cancer are very rare, it is important for urologists to listen to the patient's complaints and consider the possibility of these rare metastases in patients with advanced cancer.