Transplantation

Kidney Transplantation
Diabetes sometimes damages kidneys so badly that they no longer work.  When kidneys fail, the person needs a way to replace their function, which is to clean the blood.  One option is kidney transplantation.  

Pancreas Transplantation
In people with type 1 diabetes, the islet cells in the pancreas no longer produce insulin.  So it seems logical that giving a new pancreas to a person with type 1 diabetes would cure their disease.  Usually it does.

Islet Transplantation
If scientists can develop safe immunosuppressants that always work, then many people with type 1 diabetes may choose to have pancreas transplants.  Until then, many doctors think islet transplants are a better option.