The chest is a great place for a tattoo, and getting one there is the same as getting one anywhere else on your body. Though there is a chance that the tattoo will affect mammograms.
Even though most breast tattoos won't show up on a mammogram if they aren't too close to the breast, there are a few ways breast tattoos could affect imaging: The skin can get granulomas or keloids from tattoos. Under the skin, calcifications can happen.