Spontaneus spinal cord herniation due to an unrecognized Brown-Sequard syndrome

We report two cases of spinal cord herniation. The first one concerns a 28 year-old female who presented with an eighteen-month past history of spasti city of the right lower limb associated with somesthetic sensorial disturba nces of the left side with a T4 level, related to a T3-T4 spinal cord herni ation. The second case concerned a 58 year-old female with a past history o f a left lower limb pyramidal syndrome associated with somesthetic and prop rioceptive sensibilities disturbances of the right side with a T5 level rel ated to a T4-T5 spinal cord herniation. Spinal cold herniation is an uncommon and underestimated cause of a progres sive Brown-Sequard syndrome. The diagnosis is now easy on the MRI, showing a ventral attraction of the cord. The outcome is usually good, following th e surgical reduction of the herniation.