But since Warthin's tumor is reported to be a benign, non-aggressive tumor [24], therefore the increase amount of mdm2 in these lesions may be attributed to the expression of a smaller protein of the mdm2 molecule called p74/76 that binds to p53 and doesn't inhibit its action or even preserve its presence rather than degrade it. The gene discussed is MDM2; the disease is Warthin tumor.