[Acute spinal epidural hematoma complicated with essential thrombocytosis].

An 82-year-old woman was brought to our hospital with back pain and paraplegia. Her platelet level was elevated to 456 x 10(4) x mm(-3). She was diagnosed as having acute spinal epidural hematoma complicated with essential thrombocytosis. After emergency decompression surgery, chemotherapy with hydroxycarbamide was performed and platelets decreased to 80 x 10(4) x mm(-3). There were no perioperative complications, such as hemorrhage or thrombosis in other organs.