Thank you all for your reactions. @marion: there was no curative treatment possible due to the fact that the portal artery runs through the tumorous material and all the bile ducts are affected. as are the lympf node biopt is malignant. The treatment is palliative and consists of placing two metal stents to open the bile ducts.
@mary: Thank you for your words, this helps. I am trying to read about this and educate myself. I try to be supportive to my mom so i can provide her with as much knowledge as possible without getting into details.
@Melinda: thanks, i will update and hope to find wisdom so i can care for her in the best way possible.