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Metastatic breast carcinoma to the bilateral parotid glands is also exceedingly rare with only 2 reported case reports noted in the literature, neither of which demonstrated facial nerve paralysis. Here, we report the only known occurrence of a patient presenting with synchronous bilateral facial nerve paralysis secondary to metastatic breast carcinoma to the bilateral parotid glands. This exceedingly rare clinical presentation was further confounded by the presence of autoimmune antibodies, highlighting the importance of the diagnostic process and maintaining broad clinical suspicion.<\/jats:p>","DOI":"10.1177\/0145561320982693","type":"journal-article","created":{"date-parts":[[2021,1,25]],"date-time":"2021-01-25T21:34:19Z","timestamp":1611610459000},"page":"NP56-NP59","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Spontaneous Bilateral Facial Paralysis Secondary to Metastatic Breast Cancer"],"prefix":"10.1177","volume":"102","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0527-6172","authenticated-orcid":false,"given":"Jackson","family":"King","sequence":"first","affiliation":[{"name":"Elson S. Floyd College of Medicine at Washington State University, Spokane, WA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Farrukh R.","family":"Virani","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology\u2014Head and Neck Surgery, University of California, Davis, Medical Center, Sacramento, CA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ryan","family":"Thomas","sequence":"additional","affiliation":[{"name":"Department of Pathology and Laboratory Services, University of California, Davis, Medical Center, Sacramento, CA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lane","family":"Squires","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology\u2014Head and Neck Surgery, University of California, Davis, Medical Center, Sacramento, CA, USA"},{"name":"Veterans Affairs Northern California Healthcare System, Sacramento, CA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2021,1,25]]},"reference":[{"issue":"1","key":"bibr1-0145561320982693","first-page":"44","volume":"21","author":"Teller D","year":"1992","journal-title":"J Otolaryngol"},{"key":"bibr2-0145561320982693","doi-asserted-by":"publisher","DOI":"10.1080\/00016489.2019.1651134"},{"key":"bibr3-0145561320982693","doi-asserted-by":"publisher","DOI":"10.1111\/j.1525-1497.2006.00466.x"},{"key":"bibr4-0145561320982693","doi-asserted-by":"publisher","DOI":"10.1002\/ijc.29210"},{"issue":"5","key":"bibr5-0145561320982693","first-page":"519M","volume":"88","author":"Peart O","year":"2017","journal-title":"Radiol Technol"},{"key":"bibr6-0145561320982693","doi-asserted-by":"publisher","DOI":"10.1002\/jso.2930230311"},{"key":"bibr7-0145561320982693","doi-asserted-by":"publisher","DOI":"10.4103\/jcrt.JCRT_1047_17"},{"key":"bibr8-0145561320982693","doi-asserted-by":"publisher","DOI":"10.4103\/0972-2327.83092"},{"key":"bibr9-0145561320982693","doi-asserted-by":"publisher","DOI":"10.1177\/0194599813505967"},{"key":"bibr10-0145561320982693","doi-asserted-by":"publisher","DOI":"10.1080\/08998280.2019.1624107"},{"key":"bibr11-0145561320982693","doi-asserted-by":"publisher","DOI":"10.1016\/j.bjps.2014.04.014"},{"key":"bibr12-0145561320982693","doi-asserted-by":"publisher","DOI":"10.1007\/s00296-019-04339-z"}],"container-title":["Ear, Nose &amp; Throat Journal"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0145561320982693","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/0145561320982693","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0145561320982693","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T18:34:27Z","timestamp":1777401267000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/0145561320982693"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,1,25]]},"references-count":12,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2023,2]]}},"alternative-id":["10.1177\/0145561320982693"],"URL":"https:\/\/doi.org\/10.1177\/0145561320982693","relation":{},"ISSN":["0145-5613","1942-7522"],"issn-type":[{"value":"0145-5613","type":"print"},{"value":"1942-7522","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,1,25]]}}}