What is the most dangerous type of cancer?

Varies. Lung cancer is single commonest casue of cancer deaths. However, it is difficult to compare cancers. There are cancers that kill faster, e.g., pro-myelocytic leukemia, but are les common.

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What is the most dangerous type of cancer that person can have?

Depends. Tumors have variable behavior in different people. Some are uniformly bad if not treated early, e.g., glioblastoma, melanoma, some forms of leukemia, e.G, promyelocytic. Read more...