Detecting cancers through blood tests holds promise, but major hurdles remain
![](https://thumbnails.cbc.ca/maven_legacy/thumbnails/947/30/BIRAK_CANCER_BLOOD_TEST_MPX.jpg?crop=1.777xh:h;*,*&downsize=510px:*510w)
![](https://i.cbc.ca/1.5699580.1705631676!/fileImage/httpImage/image.jpg_gen/derivatives/original_780/colon-cancer-screening-kit.jpg)
Don't be afraid of your colonoscopy, doctors say. It could save your life
![](https://doximity-res.cloudinary.com/images/f_auto,l_text:Helvetica_130_bold:CL,co_rgb:FFFFFF,q_auto,t_profile_photo_320x320/profile-placeholder-unregistered-5/charles-linker-md-san-francisco-ca.jpg?noindex=true)
Dr. Jeffrey Venstrom, MD – San Francisco, CA
![](https://i.cbc.ca/1.6797925.1680294218!/fileImage/httpImage/image.jpeg_gen/derivatives/16x9_780/cataract-surgery.jpeg)
Marcy Cuttler
![](https://thumbnails.cbc.ca/maven_legacy/thumbnails/947/30/BIRAK_CANCER_BLOOD_TEST_MPX.jpg?crop=1.777xh:h;*,*&downsize=510px:*510w)
Detecting cancers through blood tests holds promise, but major hurdles remain
![](https://thumbnails.cbc.ca/maven_legacy/thumbnails/795/475/thedose-640x360.jpg)
Don't be afraid of your colonoscopy, doctors say. It could save your life
Ray Nichols's Instagram, Twitter & Facebook on IDCrawl
Detecting cancers through blood tests holds promise, but major hurdles remain
![](https://i.cbc.ca/1.6644069.1706806988!/cpImage/httpImage/image.jpg_gen/derivatives/16x9_780/breast-cancer-mammograms.jpg)
Cancer survival improved in Canada, but toll on health-care system a concern, society says
![](https://i.cbc.ca/1.4496143.1705520392!/fileImage/httpImage/image.jpg_gen/derivatives/original_780/colon-cancer-screening.jpg)
Don't be afraid of your colonoscopy, doctors say. It could save your life
Ray Nichols's Instagram, Twitter & Facebook on IDCrawl