Today’s most excellent article by the most excellent Cecil: [Can tumors be transplanted?](Can tumors be transplanted?)
My pedantic observation: The questioner asks about transplanting cancerous tumors. Cecil answers in the affirmative, and completely on-topic with several fascinating citations and examples. (We would expect no less.)
But the title is misleading. “Tumor” is not necessarily “cancerous tumor”:
I don’t know if anyone else would notice the distinction, or even would pay too much attention to the literal content of the title (and its discrepancy with the text), but I might humbly and most diffidently suggest tweaking the title to focus on cancer. Which is really the point of the question-and-answer. Otherwise, the other natural question and answer (“Can you transplant a benign tumor?” “Why yes, and probably nothing bad will ever happen”) is just lying there like a dead rat in the wall.