Can cancer always show up in blood tests?

Not all cancers. Most cancers are not detected in the blood initially. There are a few that produce markers that allow us to screen patients for cancer with a blood test. Prostate cancer is the most common. There are some blood markers that are used to detect GI cancers as well as to follow patients with gyn cancers as well as breast. Testicular cancer also has commonly used markers. Must be in context of case.

Related Questions

Does cancer always show up in blood tests if you have it?

NO. Unless you're anemic (low blood count) or have leukemia, basic blood tests won't show cancer. If you have true concerns, perhaps because of family tendencies, speak with your doctor. Good luck . Read more...

Would blood tests show cancerous tumors, or even benign one's in the body? OR Would a regular blood test show indications of cancer / a tumor inside?

Not very helpful. We don't have reliable blood tests to look for the common cancers. Your best bet is cancer surveillance (in your case, I trust you get pap smears if you have ever had someone special), and know the usual warning signs and get seen if they come up. Read more...

Do blood tests/CT scans show if you have cancer in the results?

Suggestion. Most blood tests and/or medical imaging will only suggest possible cancer. Confirmation is only through tissue analysis/ biopsy/ aspirate, etc. Hope it helps. Read more...
Yes, most times it d. Cancer is not difficult to diagnose but you need to go to an experienced doctor/preferably an oncologist. We look for any abnormal growth in the common sites affected by cancer(such as Lungs, Colon, Breast and Prostate). Blood tests are an aid but only provide indirect support for diagnosis. There is no single blood test that wil reliably show Cancer, at least not yet, but someday soon it is likel. Read more...