âTo the left of the pedestrian gate, which is wooden, is a mesh gate, and that had been cut,â testified Bloom.
Freebase (0.00 / 0 votes) Rate this definition: Intrathecal. Intrathecal is an adjective that refers to something introduced into or occurring in the space under the arachnoid membrane of the brain or spinal cord. For example, intrathecal immunoglobulin production means production of this substance in the spinal cord.
Intrathecal chemotherapy is given in addition to other types of chemotherapy and can be used to treat leukemia in the brain or spinal cord or, in some cases, to prevent spread of leukemia to the brain and spinal cord.