Diffuse Large B-cell Lymphoma of the Sacral Nerve Root ; Presenting as a Polyradiculoneuropathy

Primary spinal cord lymphomas are rare, and either extra-/intradural masses with leptomeningeal infiltration or intramedullary in nature. These two patterns of growth do not generally overlap. The authors present a patient with a diffuse large Bcell lymphoma involving the sacral nerve root, extension to extradural space, and the cranial nerve. The literature regarding isolated nerve root lymphoma and lymphomatous leptomeningitis was reviewed with an emphasis on the clinical, pathological and radiological entities of nerve sheath tumor or thickened nerve root, and the general management of these diseases.