LAUSR

AIM To illustrate the anatomical and pathophysiological risks of epidural hematoma formation, other than direct needle trauma, after lumbar transforaminal epidural steroid injection in the setting of severe central canal stenosis. CASE REPORT This case report presents the development of an epidural hematoma after lumbar transforaminal epidural steroid injection in a patient who has anatomical risk factor of severe lumbar spinal stenosis. The anatomic location of epidural hematoma was at the injected level, but on the contralateral side of the dura at a distance from the needle path. Epidural vascular anatomy and the potential mechanisms of bleeding in the epidural space in the absence of direct needle trauma, including the importance of injection pressures are discussed. CONCLUSION This is the first reported case of an epidural hematoma on the contralateral side of the dura at a distance from the needle tip location, in the setting of severe central canal stenosis.