Looks like about 4% of all cases of cancer can be attributed to alcohol consumption: https://www.thelancet.com/journals/lanonc/article/PIIS1470-2045(21)00279-5

Looks like about 4% of all cases of cancer can be attributed to alcohol consumption: https://www.thelancet.com/journals/lanonc/article/PIIS1470-2045(21)00279-5/fulltext https://www.thelancet.com/journals/lanonc/article/PIIS1470-2... Not the leading cause, but significant, especially when considered along with the other health based harms.