text:  CR2506 PDX model treated by antiRSPO3 antibody, biological rep2 PDX model treated by antiRSPO3 anbidy for 7wks tumor type: xenograft model of human colorectal cancer; host strain: NOD/SCID; treated with: antiRSPO3 antibody for 7wks; tissue: whole xenograft sample containing human tumor cells and mouse stroma