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By Mayo Clinic staffParaneoplastic syndromes of the nervous system are a group of rare disorders that develop in some people with cancer, most commonly in people with lung, breast or ovarian cancer. Some of these disorders are believed to occur when cancer-fighting antibodies mistakenly attack normal cells in the nervous system.
Paraneoplastic syndromes of the nervous system are rare, occurring in less than 1 percent of the people who have cancer.
Symptoms of paraneoplastic syndromes of the nervous system usually appear when cancer is still in its early stages, often before you even know you have cancer. Treatment of the cancer may eliminate the symptoms of a paraneoplastic syndrome. In some cases, your immune system may need to be suppressed.
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