[Jackie07]

Found two recent report by researchers in Europe (underline emphasis is mine):

Nat Rev Neurol. 2011 Jan 25
Monoclonal antibody therapy – associated neurological disorders
Bosch X, Saiz A, Ramos-Casals M, the BIOGEAS Study Group
Department of Internal Medicine, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital ClÃ*nic, University of Barcelona, Villarroel 170, 08036-Barcelona, Spain
Abstract
Several neurological disorders have been associated with the use of monoclonal antibodies (mAbs), especially those targeting tumor necrosis factor (TNF) and its receptors. These disorders include, among others, multiple sclerosis, optic neuritis, and various forms of peripheral demyelinating neuropathy. Progressive multifocal leukoencephalopathy, the natural course of which is lethal within months, has been mainly associated with the anti-α4-integrin mAb natalizumab and, to a lesser extent, with rituximab, alemtuzumab and efalizumab. The prevalence of demyelinating disease induced by biological therapies, as reported in randomized controlled trials and postmarketing studies, has been estimated to range from 0.02-0.20%. Peripheral neuropathies can occur early or late after initiation of therapy. Short-term follow-up indicates relatively good outcomes, sometimes after mAb discontinuation alone, although corticosteroids or intravenous immunoglobulin may be necessary to reverse and stabilize the condition. Definitive cessation of the biological therapy should be discussed on a case-by-case basis. Prospective postmarketing studies in which the control group includes patients with rheumatic autoimmune diseases-most notably rheumatoid arthritis-treated with conventional therapies could help us to evaluate the real risks and outcomes in patients receiving mAbs who develop neurological diseases.

Curr Treat Options Neurol. 2010 Dec31
Chemotherapy-induced neuropathy
Cavaletti G, Alberti P, Frigeni B, Piatti M, Susani E.
Department of Neuroscience and Biomedical Technology, University of Milano-Bicocca, Via Cadore 48, 20052, Monza, Italy, guido.cavaletti@unimib.it.
Abstract
OPINION STATEMENT: Chemotherapy-induced peripheral neurotoxicity (CIPN) is one of the most severe and unpredictable side effects of modern anticancer treatment. In recent years, a clear understanding of the importance of an integrated approach to CIPN has become evident, and efforts are increasing to better characterize its features and to identify more accurate methods to report and grade its occurrence. The clinically relevant impact of CIPN on cancer patients has been known for a long time, but knowledge of its pathogenetic aspects is still very limited. This incomplete knowledge is one of the major limitations in identifying targets for evidence-based neuroprotective strategies. Nevertheless, several studies have been devoted to the prevention or at least the effective treatment of symptoms secondary to peripheral nerve damage and to the early identification of patients at high risk of developing severe CIPN. Unfortunately, none of these studies has been successful and the optimal management of CIPN patients is still an unmet clinical need. Therefore, the modification of chemotherapy is currently the only available approach to limit the severity of neuropathy in the vast majority of patients. The indications for treatment modification are not universally accepted and they can differ among the various drugs. Generally, treatment modification should be considered as soon as symptoms and signs impair the daily life activities of the patient, but the possibility of a delayed worsening of CIPN after treatment withdrawal ("coasting") should always be considered, and delay of modification decisions should be avoided.