I don't think you know what cancer means. Here's a definition.
can·cer
?kans?r/Submit
noun
the disease caused by an uncontrolled division of abnormal cells in a part of the body.
"he's got cancer"
a malignant growth or tumor resulting from the division of abnormal cells.
plural noun: cancers
"most skin cancers are curable"
synonyms: malignant growth, cancerous growth, tumor, malignancy; More