What is the most deadliest cancer?

Answer 1

According to the CDC (Center for Disease Control) the most "deadliest" form of cancer is Lung Cancer. Here is an excerpt from their website, cdc.gov, slightly paraphrased:

In 2005 (the most recent year for which statistics are currently available), lung cancer accounted for more deaths than breast cancer, prostate cancer, and colon cancer combined.† In that year,

• 107,416 men and 89,271 women were diagnosed with lung cancer*†
• 90,139 men and 69,078 women died from lung cancer*†

*Note: Incidence counts cover 96% of the U.S. population and death counts cover 100% of the U.S. population. Use caution in comparing incidence and death counts.

†U.S. Cancer Statistics Working Group. United States Cancer Statistics: 1999--2005 Incidence and Mortality Web-based Report. Atlanta (GA): Department of Health and Human Services, Centers for Disease Control and Prevention, and National Cancer Institute; 2009. Available at: http://www.cdc.gov/uscs.