No, nothing like this has ever been observed in humans. Per Wiki: > There are no reported human cases of clonally transmissible cancers that can independently

No, nothing like this has ever been observed in humans. Per Wiki: > There are no reported human cases of clonally transmissible cancers that can independently survive and be transferred in the manner of CTVT and DFTD. However, instances of one human passing cancer cells to another through physical contact have been reported. These cases typically involve organ or hematopoietic stem cell transplants or cancers transferred from a pregnant mother to her fetus.[66] The difference of these incidences from a true clonally transmissible cancer, however, is that the cases of human transfer were one-off events — the actual tumor did not have properties allowing it to be continually transferred throughout the population, and therefore the tumor clone went extinct with the death of the host individuals.