Another localized tumor?
Not metastasis?
She has been treated for pancreatic cancer before. This is (undoubtedly) a recurrence.
Gemcitabine, with or without Taxotere, has induced some remarkable remissions of advanced pancreatic cancer. But once it recurs, it’s usually fast.
I have not examined Justice Ginsburg and I do not (obviously) have access to her medical records, so the above statements are generalizations.
As they say, every case is different.