Does cancer always show up in the blood?

No. It depends to type of cancer ,most tumor cancer in first stage don,t involved the blood until they progress to stage 3-4, but leukemia presented with blood involvement.

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...