Radionuclide cisternomyelography performed in 324 patients with posttraumatic injuries revealed the abnormality of the brain liquor tracts. The radiological picture of craniocerebral injury sequelae showed a great diversity of radionuclide signs, detected both morphological changes in the liquor tracts, and liquorodynamic disorders. The morphological disorders recorded by radionuclide cisternomyelography appeared as hydrocephalus, porencephalitis, arachnoidal cysts and liquorrheas. The liquorodynamic disorders recorded by this tool manifested themselves as altered liquor circulation and resorption. Radionuclide cisternomyelography provides valid data on the performance of the drainage system during operations on the liquor tracts of the brain and spine.