Idiopathic retinal vasculitis, aneurysms, and neuroretinitis (IRVAN). Case report and literature review Daniela Giraldo Ochoa; Silvia Caballero Mojica; John Camilo Hernández Foronda; Miguel Cuevas Peláez; Martha Lucia Muñoz Cardona;

ANCA vasculitis and membranoproliferative glomerulonephritis associated with Sjögren¿s syndrome: Case report and literature review Viviana Orozco Ortíz; Kateir Contreras Villamizar; Paola Parra; Oscar David Lucero Pantoja; Natalia Sánchez León;

Granulomatosis with polyangiitis and skin ulcers mimicking pyoderma gangrenosum: A case report of a diagnostic challenge Linda Navarrete-Motta; Onaldo-José Barrios; Sebastián Gil-Tamayo; Daniela Saaibi; Juan M. Gutiérrez; Daniel G. Fernández-Ávila; Santiago Bernal-Macías; Jorge L. Rodríguez; María-Claudia Díaz;