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In 2018, his 73-year-old mother presented with left ear pain and a lump below her left ear. An MRI scan showed multiple lesions within both parotid glands and bilateral NOH was once again diagnosed following a left superficial parotidectomy and right total parotidectomy. We believe that this is the first reported case of bilateral familial NOH.<\/jats:p>","DOI":"10.1136\/bcr-2020-240980","type":"journal-article","created":{"date-parts":[[2021,4,19]],"date-time":"2021-04-19T13:13:07Z","timestamp":1618837987000},"page":"e240980","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Familial bilateral nodular oncocytic hyperplasia of the parotid gland in mother and son"],"prefix":"10.1136","volume":"14","author":[{"given":"Yinan","family":"Zhu","sequence":"first","affiliation":[{"name":"ENT, University Hospitals Plymouth NHS Trust, Plymouth, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Manuela","family":"Cresswell","sequence":"additional","affiliation":[{"name":"ENT, Royal Devon and Exeter NHS Foundation Trust, Exeter, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonathan Miles","family":"Charnock","sequence":"additional","affiliation":[{"name":"Paediatrics, Royal Free London NHS Foundation Trust, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Philip","family":"Reece","sequence":"additional","affiliation":[{"name":"ENT, South Devon Healthcare NHS Foundation Trust, Torquay, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,4,19]]},"reference":[{"key":"2025082709210157000_14.4.e240980.1","doi-asserted-by":"crossref","first-page":"819","DOI":"10.1159\/000370146","article-title":"Multifocal adenomatous oncocytic hyperplasia of the parotid gland","volume":"7","author":"Kinoshita","year":"2014","journal-title":"Case Rep Oncol"},{"key":"2025082709210157000_14.4.e240980.2","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1136\/bcr-2018-226145","article-title":"Bilateral submandibular gland nodular oncocytic hyperplasia with papillary cystadenoma-like areas","volume":"2018","author":"Bannister","year":"2018","journal-title":"BMJ Case Rep"},{"key":"2025082709210157000_14.4.e240980.3","doi-asserted-by":"crossref","first-page":"250","DOI":"10.1097\/PAT.0000000000000079","article-title":"Human papillomavirus infection and pathogenic mitochondrial DNA mutation in bilateral multinodular oncocytic hyperplasia of the parotid","volume":"46","author":"Kurelac","year":"2014","journal-title":"Pathology"},{"key":"2025082709210157000_14.4.e240980.4","unstructured":"EI-Naggar AK , Chan JKC , Grandis JR . 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