CT myelography of subarachnoid leukemic infiltration of the lumbar thecal sac and lumbar nerve roots.

Spinal nerve root or cauda equina compression in patients with leukemia is often secondary to extradural chloroma [1]. We present the CT myelographic findings of an intradural mass and lumbar nerve root enlargement secondary to leukemic infiltration of the lumbar subarachnoid space and nerve roots. This form of leukemic involvement of the nervous system has not previously been demonstrated with CT myelography,