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In this paper we review the published literature on clinical variation in the symptoms and signs of Parkinson\u2019s disease in different ethnic groups and responses to treatment. We included any study that sampled patients with Parkinson\u2019s disease from distinct ethnic backgrounds. We conclude that whilst there is little published evidence for ethnic variation in the clinical features of Parkinson\u2019s disease, there are substantial limitations and gaps in the current literature, which mean that the evidence does necessarily not fit with clinical observation. Possible explanations for expected differences in manifestation include genetic determinants, the co-existence of cerebrovascular disease and\/or Alzheimer\u2019s disease pathology, healthcare inequalities and socio-cultural factors.<\/jats:p>","DOI":"10.3233\/jpd-191763","type":"journal-article","created":{"date-parts":[[2019,12,17]],"date-time":"2019-12-17T10:43:52Z","timestamp":1576579432000},"page":"31-45","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":107,"title":["Ethnic Variation in the Manifestation of Parkinson\u2019s Disease: A Narrative Review"],"prefix":"10.1177","volume":"10","author":[{"given":"Aaron","family":"Ben-Joseph","sequence":"first","affiliation":[{"name":"Preventive Neurology Unit, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charles 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