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Cystic pituitary abnormalities and features of empty sella have been described in only 7 patients with BHC to date. We present 4 patients from 2 families with a BHC phenotype, 3 of whom underwent targeted pituitary MR imaging and genetic testing. All four patients in the two families displayed a classic BHC phenotype. The targeted pituitary MR imaging demonstrated abnormal pituitary sella morphology. Genetic testing was performed in three patients, and showed mutations causing BHC in three of the patients, as well as identifying a novel nonsense mutation of the TITF1\/NKX2-1 gene in one of the patients. The presence of the abnormal pituitary sella in two affected members of the same family supports the hypothesis that this sign is a distinct feature of the BHC phenotype spectrum due to mutations in the TITF1 gene. Interestingly, these abnormalities seem to develop in adult life and are progressive. They occur in at least 26% of patients affected with Brain-lung-thyroid syndrome. As a part of the management of these patients we recommend to perform follow-up MRI brain with dedicated pituitary imaging also in adult life as the abnormality can occur years after the onset of chorea.<\/jats:p>","DOI":"10.1007\/s10048-021-00680-3","type":"journal-article","created":{"date-parts":[[2022,1,25]],"date-time":"2022-01-25T17:05:39Z","timestamp":1643130339000},"page":"91-102","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Altered pituitary morphology as a sign of benign hereditary chorea caused by TITF1\/NKX2.1 mutations"],"prefix":"10.1007","volume":"23","author":[{"given":"Steffi","family":"Thust","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liana","family":"Veneziano","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael H.","family":"Parkinson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kailash P.","family":"Bhatia","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elide","family":"Mantuano","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cristina","family":"Gonzalez-Robles","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Indran","family":"Davagnanam","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3508-4788","authenticated-orcid":false,"given":"Paola","family":"Giunti","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2022,1,25]]},"reference":[{"issue":"8","key":"680_CR1","doi-asserted-by":"crossref","first-page":"971","DOI":"10.1093\/hmg\/11.8.971","volume":"11","author":"GJ Breedveld","year":"2002","unstructured":"Breedveld GJ, van Dongen JW, Danesino C et al (2002) Mutations in TITF-1 are associated with benign hereditary chorea. 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