Patch Makes Certain Skin Cancers Disappear

According to Wiki [wikipedia.org] it beta decays into an electron which can be blocked with "5 mm of perspex". I'm not sure how human tissue compares with the blocking power of perspex. The other particle is an electron anti-neutrino (!) which passes harmlessly through almost everything. No gamma radiation is produced. No neutrons are produced.

If I had to be irradiated with something, Phosphorus 32 doesn't sound that bad.

Ionizing radiation can both cause and cure cancer via DNA damage. If this patch can destroy cancerous DNA, it also has a nonzero chance of creating more cancerous cells in healthy cells. So no, you can't make-believe that it's curing cancer while the rest of your skin is immune to its effects.

Additionally, most polymers can roughly be approximated as tissue-equivalent as far as penetration depth goes (only density matters to first order), which means that these electrons will penetrate up to 5mm (half a centimeter, mind you) of skin. That's well beyond the ~1mm of dead epidermal skin, and can reach the dermal stem cells.

Moral is if you're ever drunk at a party and see 32P laying around, remember that Wikipedia doesn't empower you to be immune to cancer.

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