Within a sheath.
Inside a sheath, especially inside the intradural or subarachnoid space.
A type of injection made directly through the membrane enclosing the spinal cord and into the cerebrospinal fluid (CSF).
Administration of substances within a sheath; typically refers to injection into the subarachnoid space surrounding the spinal cord.
Within the membranes or meninges which envelop the spinal cord. The intrathecal space, between the arachnoid and the pia mater, contains the cerebrospinal fluid.
The delivery of chemotherapy drugs through injection into the cerebrospinal fluid, which envelops the brain and spinal cord.