Cutaneous polyarteritis nodosa: An atypical simulator. Report of 3 cases and a narrative review of the literature Juliana Ordoñez-Parra; Alejandro Castellanos-Angarita; María Alejandra Casas-Barrera; Julián Rondón-Carvajal; Isabel Cristina Cuéllar-Ríos;

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;

Toxics and atypical manifestations. Vasculitis associated with levamisole-adulterated cocaine. A case report Silvia Calpena-Martínez; Fernando Tornero-Romero; Luis López-Cubero; Juan A. López-López;