[nanofortnight]

Pancreatic islet transplantation is already a thing. Islets are isolated and are introduced into the portal circulation. They embed themselves into the liver.

This is normally only done in patients with brittle diabetes because of the need for immunosuppression. This is a less complex procedure than a full pancreas transplant.

[defined]

Thanks, that's informative. It doesn't seem like a 3D printing application, though, am I right?