{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,22]],"date-time":"2025-11-22T11:32:05Z","timestamp":1763811125860,"version":"3.44.0"},"reference-count":12,"publisher":"BMJ","issue":"5","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2023,5,3]]},"published-print":{"date-parts":[[2023,5]]},"abstract":"<jats:p>A man in his 80s presented with gradual onset of a persistent and delusion-like perception that novel encounters are repetitions of previous experiences. Within 2\u2009years of symptom onset, he had impaired verbal memory and executive dysfunction on neuropsychological assessment. Cerebrospinal fluid core Alzheimer\u2019s disease (AD) biomarkers analysis supported probable AD. Generalised and left temporal atrophy was seen on MRI of the brain. Neurological fludeoxyglucose-positron emission tomography (PET)\/CT showed left temporal and bilateral frontal lobe hypometabolism. His presenting symptom is known as d\u00e9j\u00e0 v\u00e9cu with recollective confabulation, a rare phenomenon associated with AD and other neurodegenerative disorders. While several potential mechanisms have been previously proposed, the fludeoxyglucose-PET\/CT hypometabolism in the temporal and frontal lobes in this case suggests dual deficits in recognition memory and metacognition may be culprit mechanisms. Although uncommon, d\u00e9j\u00e0 v\u00e9cu with recollective confabulation is a fascinating phenomenon that can provide a unique insight into memory and delusional processes in dementia.<\/jats:p>","DOI":"10.1136\/bcr-2023-255411","type":"journal-article","created":{"date-parts":[[2023,5,16]],"date-time":"2023-05-16T09:56:46Z","timestamp":1684231006000},"page":"e255411","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["D\u00e9j\u00e0 v\u00e9cu with recollective confabulation: an unusual presentation of Alzheimer\u2019s disease"],"prefix":"10.1136","volume":"16","author":[{"given":"Xin","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Neurology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia"},{"name":"National Hospital of Neurology and Neurosurgery, University College London Hospitals, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nora","family":"Breen","sequence":"additional","affiliation":[{"name":"Macquarie University Hospital, Macquarie University, Sydney, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kaitlyn","family":"Parratt","sequence":"additional","affiliation":[{"name":"Department of Neurology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2023,5,16]]},"reference":[{"key":"2025082722575308000_16.5.e255411.1","doi-asserted-by":"crossref","first-page":"1541","DOI":"10.1016\/j.cortex.2013.01.010","article-title":"Disordered recognition memory: recollective confabulation","volume":"49","author":"Moulin","year":"2013","journal-title":"Cortex"},{"key":"2025082722575308000_16.5.e255411.2","first-page":"110","article-title":"D\u00e9j\u00e0 V\u00e9cu: When Groundhog day gets real","volume":"5","author":"Meulen","year":"2021","journal-title":"Arch Clin Med Case Rep"},{"key":"2025082722575308000_16.5.e255411.3","article-title":"D\u00e9j\u00e0 experiences in temporal lobe epilepsy","volume":"2012","author":"Illman","year":"2012","journal-title":"Epilepsy Res Treat"},{"key":"2025082722575308000_16.5.e255411.4","doi-asserted-by":"publisher","DOI":"10.1001\/archpsyc.1967.01730290110014"},{"key":"2025082722575308000_16.5.e255411.5","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1111\/j.1601-5215.2007.00245.x","article-title":"Recurring d\u00e9j\u00e0 vu associated with 5-hydroxytryptophan","volume":"19","author":"Kalra","year":"2007","journal-title":"Acta Neuropsychiatr"},{"key":"2025082722575308000_16.5.e255411.6","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1016\/j.cortex.2016.02.016","article-title":"History repeating itself: arnaud\u2019s case of pathological d\u00e9j\u00e0 vu","volume":"87","author":"Bertrand","year":"2017","journal-title":"Cortex"},{"key":"2025082722575308000_16.5.e255411.7","doi-asserted-by":"crossref","first-page":"142","DOI":"10.1016\/j.cortex.2016.11.006","article-title":"D\u00e9j\u00e0 vecu for news events but not personal events: a dissociation between autobiographical and non-autobiographical episodic memory processing","volume":"87","author":"Turner","year":"2017","journal-title":"Cortex"},{"key":"2025082722575308000_16.5.e255411.8","doi-asserted-by":"crossref","first-page":"367","DOI":"10.1016\/j.neuropsychologia.2014.02.007","article-title":"Vl: a further case of erroneous recollection","volume":"56","author":"Craik","year":"2014","journal-title":"Neuropsychologia"},{"key":"2025082722575308000_16.5.e255411.9","doi-asserted-by":"publisher","DOI":"10.1016\/j.neuropsychologia.2004.12.008"},{"key":"2025082722575308000_16.5.e255411.10","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1016\/j.cortex.2016.06.016","article-title":"Confabulation: what is associated with its rise and fall? A study in brain injury","volume":"87","author":"Bajo","year":"2017","journal-title":"Cortex"},{"key":"2025082722575308000_16.5.e255411.11","doi-asserted-by":"publisher","DOI":"10.1016\/j.psc.2005.05.002"},{"key":"2025082722575308000_16.5.e255411.12","doi-asserted-by":"publisher","DOI":"10.1111\/ggi.12105"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2023-255411","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T05:58:05Z","timestamp":1756360685000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2023-255411"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,5]]},"references-count":12,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2023,5,16]]},"published-print":{"date-parts":[[2023,5]]}},"alternative-id":["10.1136\/bcr-2023-255411"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2023-255411","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2023,5]]}}}