Can Silicon from a Rupture Silicon Implant Be Execreted in Excrement?

Thank you for your question. This would depend on how far the migration of the silicone particles has gone. The silicone will not be eliminated in excrement over a matter of months or years. If the silicone is into the tissue, it can migrate into the lymphatics, and to various places. This will not be excreted quickly. This level of migration is rare, and more common in those who have neglected to see a physician when symptoms first occurred, or did not have mammograms. I hope this helps.

I know of no report or incident of silicone being excreted in any body fluid.  It is possible for microscopic particles to migrate to the associated lymph nodes.  

The silicone form breast implants will stay locally in the capsule or surrounded by local tissue if an implant ruptures.  I do not know of any studies showing that it gets excreted in any way.