[A case of spinal epidural hematoma associated with idiopathic thrombocytopenic purpura].

Spinal epidural hematoma is a rare clinical entity, and the literature provides reports of 29 cases so far in Japan. A case of spinal epidural hematoma associated with idiopathic thrombocytopenic purpura diagnosed by CT scan and MRI is reported in detail with references to the literature. A 56-year-old female was admitted to our hospital on April 22, 1990, because of sudden onset of nuchal pain and right hemiparesis. Her consciousness was alert, but the deep tendon reflex was depressed, and pathological reflex such as Babinski's reflex was positive on the right side. Nuchal stiffness was observed. CT scan of the head revealed no abnormality, but the scan of cervical area showed an abnormal high density area in the right posterior region of the spinal cord at C2 - 3 level. MRI also revealed a low intensity area in the same region both in T1 and T2 weighted images. On admission, the platelet count was 10,000/microliters, and the bone marrow aspirate showed abundant megakaryocytes. The patient was diagnosed as having spinal epidural hematoma associated with idiopathic thrombocytopenic purpura. The patient was initially treated with a corticosteroid and a hyperosmotic agent. About 15 hours after the onset, her motor function began improving. Conservative therapy was continued, and she could walk 2 weeks after the onset. Spinal epidural hematoma is an uncommon disease commencing with back and radicular pain, paraplegia and rectovesical insufficiency. Early diagnosis and surgical decompression is generally imperative, although an exceptional remission without operation such as was observed in this case may occur.