Undifferentiated and Dedifferentiated Metastatic Melanomas Masquerading as Soft Tissue Sarcomas: Mutational Signature Analysis and Immunotherapy Response

Israel S. Kasago, Walid K. Chatila, Cecilia Lezcano, Christopher A. Febres‐Aldana, Nikolaus Schultz, Chad Vanderbilt, Snjezana Doğan, Edmund K. Bartlett, Sandra P. D’Angelo, William D. Tap, Samuel Singer, Marc Ladanyi, Alexander N. Shoushtari, Klaus J. Busam, Meera Hameed