“PO-83 | Serum Diamine Oxidase Activity in Patients With Cluster Headache: A Cross-Sectional case–control Study: Silvia Boschi,1 Elisa Maria Piella,1 Tilde Manetta,3 Paola Merlach,3 Alberto Mario Chiarandon,1 Alessia Agostinelli,1 Barbara Donati Morello,3 Giulio Mengozzi,3 Innocenzo Rainero,1,2 Elisa Rubino,1,2 | 1Department of Neuroscience ‘Rita Levi Montalcini’, University of Turin, Turin, Italy; 2Headache Center, Department of Neuroscience and Mental Health, AOU Città Della Salute E Della Scienza Di Torino, Turin, Italy; 3Department of Laboratory Medicine, Città Della Salute E Della Scienza University Hospital, Turin, Italy”. 2025. Confinia Cephalalgica, October. https://doi.org/10.4081/cc.2025.15907.