Cancer is an insidious killer. Often, it sneaks up on people and gets a stranglehold on their health before they even realize that something is wrong. Yet survival often depends on how early cancer is caught — and that means knowing the signs a tumor is present.
http://www.newsmax.com/Health/Cancer/cancer-symptoms-never-ignore/2017/02/24/id/775378/
12 Cancer Symptoms You Should Never Ignore