cancerphobia

noun
can·​cer·​pho·​bia | \ ˌkan(t)-sər-ˈfō-bē-ə How to pronounce cancerphobia (audio) \
variants: or cancerophobia \ -​sər-​ō-​ˈfō-​ How to pronounce cancerophobia (audio) \

Medical Definition of cancerphobia

: an abnormal dread of cancer