ELI5? I'm still working on my half sleeve tattoo and wondering if I now have cancer..... Thanks!
As someone who reads lymphoscintigraphy and sees all manner of foreign objects, especially breast implants, leak and end up in lumpy nodes, this is completely unsurprising. That's where shit goes, I'm not sure what was expected.
Edit: I think finding deposition in distant organs, the brain especially, would be interesting.
I have quite a few tattoos, and one of the pathologists I worked with said there was a correlation between tattoos and getting lymphoma later on. Many searches proved this untrue, but a different pathologist said it can make it more difficult to detect metastatic melanoma in lymph nodes (especially with dark ink).
My wife had tattoo ink travel from her back to her tailbone and become a recurring cyst that had to be removed. Not cancer, but super uncomfortable.
More reading here...
"Tattoo ink nanoparticles in skin tissue and fibroblasts".
Starting points for the above article are:
1. Tattoo inks contain nanoparticles, which have higher levels of chemical activity than larger particles.
2. Not much research has been done into the toxicity of tattoo inks, so we know very little about the biochemical reactivity of ink particles with skin cells and tissues (plus constituent components, like fibroblasts and associated collagen fibrillar networks).
3. Ink manufactures are not obliged to disclose the contents of their ink.
But it could be argued that mass tattoo uptake is peaking as cultural & fashion saturation points are reached. So any significant effects of chemicals being pumped into the dermis might only affect one or 2 generations (the recent upsurge in large-scale / populist tattoo usage) and then be forgotten as fashions move on.