Tham, Jennifer ELynch, LucyLaursen, Stig BLaine, LorenDalton, Harry RNgu, JeffreyRedondo-Cerezo, EduardoSchultz, MichaelMurray, IainMichell, NickMorris, Alan JNielsen, Michael MStanley, Adrian J2023-05-032023-05-032022-05-132364-3722http://hdl.handle.net/10668/19657Background and study aims  Mallory Weiss tears (MWTs) are relatively uncommon causes of upper gastrointestinal bleeding (UGIB), and patients are generally considered at low risk of poor outcome, although data are limited. There is uncertainty about use of endoscopic therapy. We aimed to describe and compare an international cohort of patients presenting with UGIB secondary to MWT and peptic ulcer bleeding (PUB). Patients and methods  From an international dataset of patients undergoing endoscopy for acute UGIB at seven hospitals, we assessed patients with MWT bleeding, including the endoscopic stigmata and endoscopic therapy applied. We compared baseline parameters, rebleeding rate, and 30-day mortality between patients with MWT and PUB. Results  A total of 3648 patients presented with UGIB, 125 of whom (3.4 %) had bleeding from a MWT. Those patients were younger (61 vs 69 years, P  enAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/research article35571482open access10.1055/a-1784-0655PMC9106442http://www.thieme-connect.de/products/ejournals/pdf/10.1055/a-1784-0655.pdfhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC9106442/pdf