Spontaneous and idiopathic chronic spinal epidural hematoma: two case reports and review of the literature.

摘要

Spinal epidural hematoma (SEH) represents the most fre quent entity of acute or chronic spinal bleeding. Based upon pathogenesis, SEH can be classified as idiopathic, spontaneous, and secondary. The idiopathic forms are considered not to be attributed to any specific risk factors. Spontaneous SEH, accounting for 0.3-0.9% of all spinal epidural space occupying lesions, instead is associated with risk factors (such as substantial soft trauma or coagulation abnormalities).