[Case of deep cerebral venous thrombosis associated with breast cancer].

A 69-year-old woman was admitted to our hospital because of disturbed consciousness. She awoke to a solid mass in her left breast, but it had been present for about 20 years. On arrival to our hospital, she was comatose, and Babinski's reflexes were present bilaterally. She had no paresis or neck stiffness. Her left breast contained a 10 cm x 12 cm node with multiple ulcers. Blood analysis showed she was in a hypercoagulative state. Computed tomography of the brain demonstrated bilateral hypodensities in the thalamus and hyperdensities at the vein of Galen and at the straight sinus. Angiography showed an absence of flow in the inferior sagittal sinus, in the vein of Galen, and in the straight sinus. Thus, she was diagnosed as having a deep cerebral venous thrombosis. She was treated by continuous heparin infusion, and her consciousness improved gradually. The biopsy of her left breast confirmed the presence of a mucinous carcinoma. The hypercoagulative state associated with the carcinoma was considered to be the cause of her deep cerebral venous thrombosis. It is very rare to diagnose deep cerebral venous thrombosis in a cancer patient while the patient is still alive. In this case, computed tomography of the brain was useful for the diagnosis.