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  • Title: Cancer in patients with motor neuron disease, multiple sclerosis and Parkinson's disease: record linkage studies.
    Author: Fois AF, Wotton CJ, Yeates D, Turner MR, Goldacre MJ.
    Journal: J Neurol Neurosurg Psychiatry; 2010 Feb; 81(2):215-21. PubMed ID: 19726405.
    Abstract:
    OBJECTIVE: To determine the risk of cancer before and after the diagnosis of motor neuron disease (MND), multiple sclerosis (MS) and Parkinson's disease (PD). METHODS: Analysis of statistical database of linked statistical abstracts of hospital and mortality data in an area in southern England. RESULTS: Only people with PD showed a significant difference in the overall incidence of cancer compared with controls (rate ratio (RR) 0.76, 95% CIs 0.70 to 0.82 before PD; RR 0.61, 0.53 to 0.70, after PD). RRs were close to 1 for cancer in patients after MND (0.98, 0.75 to 1.26) and after MS (0.96, 0.83 to 1.09). There were high rate ratios for malignant brain cancer (7.4, 2.4 to 17.5) and Hodgkin's lymphoma (5.3, 1.1 to 15.6) in patients diagnosed with MND after cancer. In people with MS, malignant brain cancer also showed an increased RR both before hospital admission with a diagnosis of MS (3.2, 1.1 to 7.6) and after (2.4, 1.2 to 4.5). In people with PD, several specific cancers showed significantly and substantially reduced RRs for cancer, notably smoking related cancers, including lung cancer (0.5, 0.4 to 0.7, before PD; 0.5, 0.4 to 0.8, after PD) but also cancers that are not strongly smoking related, including colon cancer (0.7, 0.6 to 0.9, before PD; 0.5, 0.4 to 0.8, after PD). CONCLUSIONS: People with MND, or MS, do not have an altered risk of cancer overall. There may sometimes be misdiagnosis between MND or MS and brain tumours. PD carries a reduced risk of cancer overall, of some smoking related cancers and of some cancers that are not smoking related.
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