Are cancer patients where the cancer is localized to a specific organ eligible to receive an organ transplant? just curious.

Depends: This is always at the discretion of the transplant surgeon, but largely depends on the type of cancer. Very localized skin cancers are not likely to cause an issue whereas others entail such a dire prognosis, transplant may not be an option. Also, transplant is also a treatment for some cancers in selected patients--the liver is the best example here.