Real quick though, we don’t use urine pregnancy test for testing for HCG in persons suspected of a choriocarcinoma though, because the desirable traits for a home pregnancy test (relatively easy to use, relatively cheap compared to a blood test, few false negatives, can be done at home, non-invasive) is different from the desirable traits in a testicular cancer screen or any cancer screen.
The levels of HCG in a pregnant person’s urine are different from the levels of HCG in a person with a choriocarcinoma, be that a person with ovaries or a person with testes. Additionally, not all testicular cancers present with HCG in the blood stream. Choriocarcinomas, derived from the same cells as placentas, are super invasive and dangerous (and resistant to chemotherapy if they arise from testicles or de novo not associated with a pregnancy in ovaries), but they are also quite rare, especially for a testicular cancer.
There’s a much better chance of finding a tumor if you are a person with testicles if you do monthly testicular exams and are safe and smart about checking for lumps and telling your doctor about any changes you have noticed in your body recently, One in 125 people with testicles will have a testicular tumor in their lifetime (much more if you are a person with testicles and Androgen Insensitivity Syndrome, or descended testicles, among other things), but of those only 0.5% of people will have a tumor that will probably present with HCG.
Just saying, if we’re doing PSA’s, talking about being smart about your body, proper self-screening, and being straight with your doctor might save more lives than knowing about this home pregnancy factoid.
(Source: srsfunny, via owlmylove)