Fig. 1From: Multiple lumbar punctures aiming to relieve headache results in iatrogenic spinal hematoma: a case reportInitial images: Sagittal magnetic resonance imaging lumbar spine T1-weighted (left) and T2-weighted (right). There is a small volume T1 hyperintense intradural blood clot (asterisk) intermeshed with cauda equina nerve roots in posterior aspect of the thecal sac at L5 vertebral level. On the T2 weighted sequence, the clot appears relatively hypointense to the cerebrospinal fluidBack to article page