A case of purulent infection of spinal epidural space is reported. A pyo-dermitis was the infection's origin and the onset of the neurologic symptoms was coincident with a spinal trauma. For diagnostic purposes, the authors call attention to: 1) neurologic symptomatology indicating damage of structures contained in the vertebral canal; 2) citochemical differences verified by simultaneous examination of suboccipital and lumbar cerebrospinal fluids; 3) slow contrast progress showed by mielography. The treatment with antibiotics and glicocorticoids was successfull. Clinical treatment of epiduritis at the acute stage is recommended.