To understand the biology underlying antitumor response, we conducted a multiparametric analysis including genomics, proteomics and computational pathology and found that deeper antitumor activity was observed in models with elevated B7-H4 expression as well as in models with defects in DNA damage repair (DDR)...These data suggest that AZD8205 is a promising therapeutic candidate for the treatment of B7-H4 positive solid tumors.