PMID- 37503483 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230729 IS - 2168-8184 (Print) IS - 2168-8184 (Electronic) IS - 2168-8184 (Linking) VI - 15 IP - 6 DP - 2023 Jun TI - A Rare Presentation of Narcolepsy With Cataplexy After Vaccines in a Genetically Susceptible Elderly Woman: A Case Report. PG - e40997 LID - 10.7759/cureus.40997 [doi] LID - e40997 AB - Observing cataplexy episodes during an office visit is extremely rare as they are usually triggered by laughter or emotional stress. Narcolepsy usually occurs in the younger population. We report a case of a 65-year-old Caucasian female with a past medical history of obesity who developed excessive daytime sleepiness, fatigue, and sleep attacks five weeks after getting influenza and pneumococcal vaccines. The presentation of cataplexy was atypical. Several episodes of cataplexy were observed during the office visit without any emotional trigger. Further workup, including polysomnography (PSG), was positive for obstructive sleep apnea, controlled with continuous positive airway pressure (CPAP) use. Later, she had PSG with CPAP use, which optimally controlled obstructive sleep apnea, followed by multiple sleep latency tests (MSLT) with CPAP use. It was positive for narcolepsy with a mean sleep latency of 1.6 minutes with sleep onset rapid eye movement (REM) in five out of five naps. Her cerebrospinal fluid (CSF) hypocretin level was extremely low at 50 pg/ml, usually seen in narcolepsy with cataplexy. She was also positive for human leukocyte antigen (HLA) DBQ1*06:02. The diagnosis of narcolepsy with cataplexy was made, which improved with medications for narcolepsy. CI - Copyright (c) 2023, Verma et al. FAU - Verma, Ram K AU - Verma RK AD - Sleep Medicine, Parkview Health System, Fort Wayne, USA. FAU - Prasad, Vinita AU - Prasad V AD - Psychiatry, Parkview Health System, Fort Wayne, USA. FAU - Rath, Subhendu AU - Rath S AD - Department of Neurology, Virginia Commonwealth University School of Medicine, Richmond, USA. FAU - Monga, Varun AU - Monga V AD - Psychiatry, Banner Health, Phoenix, USA. FAU - Dhillon, Gagandeep AU - Dhillon G AD - Internal Medicine, Baltimore Washington Medical Center (BWMC), Glen Burnie, USA. LA - eng PT - Case Reports DEP - 20230626 PL - United States TA - Cureus JT - Cureus JID - 101596737 PMC - PMC10371286 OTO - NOTNLM OT - cataplexy OT - elderly OT - genetically OT - narcolepsy OT - vaccines COIS- The authors have declared that no competing interests exist. EDAT- 2023/07/28 06:43 MHDA- 2023/07/28 06:44 PMCR- 2023/06/26 CRDT- 2023/07/28 04:31 PHST- 2023/06/26 00:00 [accepted] PHST- 2023/07/28 06:44 [medline] PHST- 2023/07/28 06:43 [pubmed] PHST- 2023/07/28 04:31 [entrez] PHST- 2023/06/26 00:00 [pmc-release] AID - 10.7759/cureus.40997 [doi] PST - epublish SO - Cureus. 2023 Jun 26;15(6):e40997. doi: 10.7759/cureus.40997. eCollection 2023 Jun.