Guillain-Barré syndrome and glioblastoma.

Guillain-Barré syndrome (GBS) is defined as an acute demyelinating peripheral neuropathy. We describe a case of GBS in a patient with glioblastoma undergoing chemotherapy treatment. A 57 year old woman diagnosed with glioblastoma developed a subacute progressive history of bilateral symmetric numbness of her fingers and toes, belt-type neuropathic pain, a left facial droop and upper and lower extremity muscle weakness. There was no evidence of a tumor mass or leptomeningeal disease in the spine. Electrophysiological studies confirmed the diagnosis. Although rare, GBS should be considered in primary brain tumor patients with generalized acute-subacute progressive weakness that is inconsistent with the location of their tumor, particularly if they are also on chemotherapy contributing to their immunosuppressive state.