SSX1 and head and neck squamous cell carcinoma: Atanackovic D. et al. [1] found a number of CTA expressed in HNSCC at the mRNA level, namely MAGE-A3, SSX-1, MAGE-C2, MAGE-C1, BAGE, SSX-2, SCP-1, NY-ESO-1, and HOM-TES-85.