[Useful MRI findings for diagnosis of postspinal headache: a case report].

A 49-year-old man developed severe headache after spinal anesthesia. We found diffuse meningeal enhancement on gadolinium enhanced MRI and diffuse meningeal thickening on plain MRI. These MRI findings and postural headache suggest intracranial hypotension. Injection of autologous blood 10 ml into his epidural space was effective to ameliorate the headache. MRI findings were useful for the diagnosis of postspinal headache.