...we report the results of a phase I trial in patients with HER2+ solid tumors….with GC/GEJ (n=25); BC (n=16); gynecological cancer (n=6); CRC (n=10); BTC (n=5); UC (n=2); melanoma, pancreatic and salivary duct cancer (n=1 each) were treated with PRS-343....PRS-343 is the first 4-1BB bispecific to demonstrate encouraging evidence of safety and clinical benefit with a correlative PD effect.