Monotherapy With Immune Checkpoint Inhibitors in Patients With Recurrent and/or Metastatic Sinonasal Squamous Cell Carcinoma. - Lein, Alexander; Fuereder, Thorsten; Stoeth, Manuel; Scherzad, Agmal; Hackenberg, Stephan; Schnöll, Julia; Kadletz‐Wanke, Lorenz; Heiduschka, Gregor; Jaiswal, Archana; Bhalla, Rajiv; Kenner, Lukas; Brkic, Faris F. (Cancer Medicine, 2025)