You made that up
Why would I lie? From the American Cancer Society:
In the past, circumcision (removing the foreskin on the penis) was suggested as a way to lower penile cancer risk. This was based on studies that reported much lower penile cancer rates among circumcised men than among uncircumcised men. But in some studies, the protective effect of circumcision wasn’t seen after factors like smegma and phimosis were taken into account. Still, some experts have said that circumcision prevents penile cancer.