Cancer/tumor

I would like to ask u guys to pray for my grandfather, he has been a christian most of his life, i just received a txt from my dad in Mexico saying that my grandpa is getting operated because he has cancer and a cancerous tumor in the colon, i believe God is in control, and i know that God hears our prayers, so please join me in prayer for him, his name is Antonio, thank u an God bless u all.