...confirmed the presence of the DEK-AFF2 fusion with RNA-seq...Six months after the last chemotherapy treatment, the patient began treatment with an anti-PD-1 antibody (Pembrolizumab), which induced a radiographic response after 5 months, and complete regression of disease by 8 months (Fig. 1b). The patient was treated for an additional year, completed treatment at 20 months, and remains disease-free at 29 months.