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It includes inherited forms, the most common of which is autosomal dominant Huntington's disease (\n                      <jats:styled-content style=\"fixed-case\">HD<\/jats:styled-content>\n                      ). In addition, there are disorders mimicking\n                      <jats:styled-content style=\"fixed-case\">HD<\/jats:styled-content>\n                      , the so\u2010called\n                      <jats:styled-content style=\"fixed-case\">HD<\/jats:styled-content>\n                      \u2010like (\n                      <jats:styled-content style=\"fixed-case\">HDL<\/jats:styled-content>\n                      ) syndromes.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods and Results<\/jats:title>\n                    <jats:p>\n                      Here we review main clinical, genetic, and pathophysiological characteristics of\n                      <jats:styled-content style=\"fixed-case\">HD<\/jats:styled-content>\n                      and the rare\n                      <jats:styled-content style=\"fixed-case\">HD<\/jats:styled-content>\n                      phenocopies in order to familiarize clinicians with them. Molecular studies have shown that\n                      <jats:styled-content style=\"fixed-case\">HD<\/jats:styled-content>\n                      phenocopies account for about 1% of suspected\n                      <jats:styled-content style=\"fixed-case\">HD<\/jats:styled-content>\n                      cases, most commonly due to mutations in\n                      <jats:italic>C9orf72<\/jats:italic>\n                      (also the main cause of frontotemporal dementia and amyotrophic lateral sclerosis syndromes),\n                      <jats:styled-content style=\"fixed-case\">TATA<\/jats:styled-content>\n                      box\u2010binding protein (spinocerebellar ataxia type 17 [\n                      <jats:styled-content style=\"fixed-case\">SCA<\/jats:styled-content>\n                      17]\/\n                      <jats:styled-content style=\"fixed-case\">HDL<\/jats:styled-content>\n                      4), and\n                      <jats:italic>\n                        <jats:styled-content style=\"fixed-case\">JPH<\/jats:styled-content>\n                        3\n                      <\/jats:italic>\n                      (\n                      <jats:styled-content style=\"fixed-case\">HDL<\/jats:styled-content>\n                      2). Systematic screening studies also revealed mutations in\n                      <jats:italic>\n                        <jats:styled-content style=\"fixed-case\">PRNP<\/jats:styled-content>\n                      <\/jats:italic>\n                      (prion disease),\n                      <jats:italic>\n                        <jats:styled-content style=\"fixed-case\">VPS<\/jats:styled-content>\n                        13A\n                      <\/jats:italic>\n                      (chorea\u2010acanthocytosis),\n                      <jats:italic>\n                        <jats:styled-content style=\"fixed-case\">ATXN<\/jats:styled-content>\n                        8\n                        <jats:styled-content style=\"fixed-case\">OS<\/jats:styled-content>\n                        \u2010\n                        <jats:styled-content style=\"fixed-case\">ATXN<\/jats:styled-content>\n                        8\n                      <\/jats:italic>\n                      (\n                      <jats:styled-content style=\"fixed-case\">SCA<\/jats:styled-content>\n                      8), and\n                      <jats:italic>\n                        <jats:styled-content style=\"fixed-case\">FXN<\/jats:styled-content>\n                      <\/jats:italic>\n                      (late\u2010onset Friedreich's Ataxia) in single cases. Further differential diagnoses to consider in patients presenting with a clinical diagnosis consistent with\n                      <jats:styled-content style=\"fixed-case\">HD<\/jats:styled-content>\n                      , but without the\n                      <jats:styled-content style=\"fixed-case\">HD<\/jats:styled-content>\n                      expansion, include dentatorubral\u2010pallidoluysian atrophy and benign hereditary chorea (\n                      <jats:italic>\n                        <jats:styled-content style=\"fixed-case\">TITF<\/jats:styled-content>\n                        1\n                      <\/jats:italic>\n                      ), as well as the recently described form of\n                      <jats:italic>\n                        <jats:styled-content style=\"fixed-case\">ADCY<\/jats:styled-content>\n                        5\n                      <\/jats:italic>\n                      \u2010associated neurodegeneration. Lastly, biallelic mutations in\n                      <jats:italic>\n                        <jats:styled-content style=\"fixed-case\">RNF<\/jats:styled-content>\n                        216\n                      <\/jats:italic>\n                      and\n                      <jats:italic>\n                        <jats:styled-content style=\"fixed-case\">FRRS<\/jats:styled-content>\n                        1L\n                      <\/jats:italic>\n                      have recently been reported as autosomal recessive phenocopies of\n                      <jats:styled-content style=\"fixed-case\">HD<\/jats:styled-content>\n                      .\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>There is a growing list of genes associated with chorea, yet a substantial percentage of patients remain undiagnosed. It is likely that more genes will be discovered in the future and that the clinical spectrum of the described disorders will broaden.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/mdc3.12312","type":"journal-article","created":{"date-parts":[[2016,1,27]],"date-time":"2016-01-27T07:40:55Z","timestamp":1453880455000},"page":"342-354","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":52,"title":["Huntington's Disease, Huntington's Disease Look\u2010Alikes\u200e, and Benign Hereditary Chorea: What's New?"],"prefix":"10.1002","volume":"3","author":[{"given":"Susanne A.","family":"Schneider","sequence":"first","affiliation":[{"name":"Department of Neurology Ludwig\u2010Maximilians\u2010Universit\u00e4t M\u00fcnchen Munich Germany"},{"name":"University of Kiel Kiel Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Bird","sequence":"additional","affiliation":[{"name":"Department of 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