{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,25]],"date-time":"2026-04-25T05:36:48Z","timestamp":1777095408487,"version":"3.51.4"},"reference-count":43,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T00:00:00Z","timestamp":1770768000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T00:00:00Z","timestamp":1770768000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Annals of Neurology"],"published-print":{"date-parts":[[2026,5]]},"abstract":"<jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>Polymicrogyria (PMG) is one of the most common human malformations of cortical development and is often classified by its radiographic pattern of distribution. Unilateral polymicrogyria (uPMG) is a subtype of PMG affecting a portion or all of one cerebral hemisphere. As most PMGs occur bilaterally, there has been no specific investigation as to whether the genetic underpinnings of uPMG comprise a subset of or a distinct entity from bilateral PMG. In this study, our goal was to assess both the genetic etiology of uPMG and the value of diagnostic genetic testing in this setting.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We conducted a retrospective analysis of clinical data from individuals with uPMG seen in the Brain Development and Genetics Clinic and\/or research participants of the Walsh Laboratory at Boston Children's Hospital. The final study cohort included 35 individuals from 30 families who were diagnosed with uPMG on brain magnetic resonance imaging (MRI) and also underwent genetic testing.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      A likely genetic cause was identified in 26.7% (8\/30) of unrelated individuals with uPMG in this cohort and segregated within one family (10\/35 total subjects). Recessive genetic causes included\n                      <jats:italic>ASPM<\/jats:italic>\n                      ,\n                      <jats:italic>WDR62<\/jats:italic>\n                      , and\n                      <jats:italic>TMEM216<\/jats:italic>\n                      . Dominant causes included 22q deletion syndrome,\n                      <jats:italic>DYNC1H1<\/jats:italic>\n                      ,\n                      <jats:italic>SCN3A<\/jats:italic>\n                      , and hereditary hemorrhagic telangiectasia (\n                      <jats:italic>HHT<\/jats:italic>\n                      ) genes,\n                      <jats:italic>ACVRL1<\/jats:italic>\n                      and\n                      <jats:italic>ENG<\/jats:italic>\n                      . This is the first report of variants in\n                      <jats:italic>DYNC1H1<\/jats:italic>\n                      ,\n                      <jats:italic>TMEM216<\/jats:italic>\n                      , and\n                      <jats:italic>ACVRL1<\/jats:italic>\n                      in association with uPMG.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Interpretation<\/jats:title>\n                    <jats:p>The genetic causes of bilateral PMG and uPMG can overlap, but some are unique to certain distributions of the malformation. Genetic explanations for uPMG are found at comparable rates to bilateral PMG, suggesting that germline testing for this unique presentation is warranted. ANN NEUROL 2026;99:1277\u20131286<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ana.78169","type":"journal-article","created":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T11:21:37Z","timestamp":1770808897000},"page":"1277-1286","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Diverse Genetic Etiologies of Unilateral Polymicrogyria"],"prefix":"10.1002","volume":"99","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4496-1359","authenticated-orcid":false,"given":"Abbe","family":"Lai","sequence":"first","affiliation":[{"name":"Division of Genetics and Genomics, and Howard Hughes Medical Institute Boston Children's Hospital  Boston MA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jennifer E.","family":"Neil","sequence":"additional","affiliation":[{"name":"Division of Genetics and Genomics, and Howard Hughes Medical Institute Boston Children's Hospital  Boston MA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shyam K.","family":"Akula","sequence":"additional","affiliation":[{"name":"Division of Genetics and Genomics, and Howard Hughes Medical Institute Boston Children's Hospital  Boston MA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dina","family":"Amrom","sequence":"additional","affiliation":[{"name":"Neurogenetics Unit, Montreal Neurological Institute and Hospital, Department of Neurology and Neurosurgery McGill University  Montreal Quebec Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eva","family":"Andermann","sequence":"additional","affiliation":[{"name":"Neurogenetics Unit and Epilepsy Research Group, Montreal Neurological Institute and Hospital, Department of Neurology and Neurosurgery and Human Genetics McGill University  Montreal Quebec 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