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. 2019 Sep;8(12):5574-5576.
doi: 10.1002/cam4.2474. Epub 2019 Aug 8.

Are 90% of deaths from cancer caused by metastases?

Hanna Dillekås  1 , Michael S Rogers  2 , Oddbjørn Straume  3   4
Affiliations

Are 90% of deaths from cancer caused by metastases?

Hanna Dillekås et al. Cancer Med. 2019 Sep.

Abstract

Numerous publications have stated that metastases are responsible for 90% of cancer deaths, but data underlying this assertion has been lacking. Our objective was to determine what proportions of cancer deaths are caused by metastases. Population-based data from the Cancer Registry of Norway for the years 2005-2015 was analyzed. We compared all deaths in the Norwegian population where a cancer diagnosis was registered as cause of death. Deaths caused by cancer, with and without metastases, were analyzed, by sex and tumor group. For solid tumors, 66.7% of cancer deaths were registered with metastases as a contributing cause. Proportions varied substantially between tumor groups. Our data support the idea that the majority of deaths from solid tumors are caused by metastases. Thus, a better understanding of the biology of metastases and identification of druggable targets involved in growth at the metastatic site is a promising strategy to reduce cancer mortality.

Keywords: cancer registry; cause of death; epidemiology; metastasis; survival.

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