It's not just done genetically. Xenografts are done pretty consistently in cancer studies. You take a small piece of tumor that and implant it; usually, into a mouse that has been inbred to specifically knockout their immune system (or important parts of it anyway). This also gives you the advantage of being able to test against a human tumor in an animal model.
They also inject tumor based cell lines in order to produce a false tumor.
Allchemyst t1_iw33tqx wrote
Reply to comment by Chiperoni in How do medical researchers obtain lab animals with diseases like specific forms of cancer which arise spontaneously? Do they raise thousands of apes and hope some eventually develop the disease? by userbrn1
To continue on this:
It's not just done genetically. Xenografts are done pretty consistently in cancer studies. You take a small piece of tumor that and implant it; usually, into a mouse that has been inbred to specifically knockout their immune system (or important parts of it anyway). This also gives you the advantage of being able to test against a human tumor in an animal model.
They also inject tumor based cell lines in order to produce a false tumor.