[Post-traumatic subarachnoid hemorrhage of the cauda equina]

A case of subarachnoid hematoma of the cauda equina is described. The lesion developed in a patient receiving anti-coagulant treatment after a seemingly ordinary fall from a ladder. Neurosurgery achieved complete regression of the neurological defects in two weeks. The mechanism of development of the lesions is discussed. This form of complication of spinal trauma is fortunately exceptional.