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The original was posted on /r/todayilearned by /u/Cultural_Magician105 on 2025-04-04 19:27:41+00:00.

Original Title: TIL That in 2007 a 53 year old woman died from a stroke and four people recieved kidneys, lungs and liver transplants from her. All four of them developed breast cancer, with three of them dying from it. The donor had breast cancer that hadn’t been found at the time of her death.