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Paraneoplastic syndromes are defined as the remote effects of malignancy that cannot be attributed either to direct invasion or metastasic lesions. These syndromes may be the first sign of a malignancy (early detection) and some of them may constitute a more urgent hazard to life than the underlying cancer, which is why they are important to the clinician.
These syndromes have been classified according to the effects they may produce in endocrinologic, dermatologic, hemawlogic, metabolic or neuromusculars. In this review we will concentrate in those related with the central nervous system because they are frequently overlooked by the physician.
Neuronal paraneoplastic syndromes have been found to be caused by the production of antineuronal antibodies, since tumoral antigens are similar to neuronal they involve in a cross-reactive antibody. We will emphasize in those antibodies described in the literature. The paraneoplastic syndromes will be review according to clinical presentation, pathology and prognostic aspects.