Combination of Lenvatinib and Pembrolizumab as Salvage Treatment for Paucicellular Variant of Anaplastic Thyroid Cancer: A Case Report oleh Cristina Luongo, Tommaso Porcelli, Francesca Sessa, Maria Angela De Stefano, Francesco Scavuzzo, Vincenzo Damiano, Michele Klain, Claudio Bellevicine, Elide Matano, Giancarlo Troncone, Martin Schlumberger, Domenico Salvatore