SPOCK1 and nonpapillary renal cell carcinoma: Herein, we established a ccRCC-bearing model by orthotopically transplanting luciferase-tagged cells, Caki-1-mock-luciferase, Caki-1-SPOCK1-luciferase, or Caki-1-shSPOCK1-luciferase, into NOD-SCID mice.