They took out 3 tiny pieces to send in for microscopic evaluation. A marker is a small piece of metal they inject into the affected area so they can find it again. Shoot, at 2" long i don't think finding it should be an issue.
so will you set of metal detectors at an air port.

Just in case pic a good looking man to "frisk" you

please get granny to destinations & back home safely
dedicate to Granny 
you are the devil