IGF2R and neoplasm: Contrary to parental FRL14 cells (tumors/injections: 9/9; tumor weight: 13–219 mg; median: 48 mg), tumor formation by FRL14/IGF2R wt cells was reduced and the tumors were smaller (tumors/injections: 5/9; tumor weight: 0–100 mg; median: 18 mg).